Choose the best answers (A, B, C or D) to complete the text.

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The screen habits of UK teens
The statistics keep changing, and fast. But the latest information (1) we have is that British teenagers now spend more than nine hours a day online. In a 2013 survey by Logicalis Group, a number of UK teenagers, (2) ages were between 13 and 17, answered a series of questions about their screen habits. They (3) the researchers the amount of time they spent on social media websites. The average answer was one hour and 40 minutes a day, (4) is approximately the same amount of time that they spend streaming videos and music over the Internet. The 1,000 teens who took part in the survey also admitted (5) an average of 72 minutes a day playing video games and 55 minutes messaging their friends. One interesting thing we can see about today's teens, (6) they are online, is that they are very good at multi-tasking. That means that their nine hours of digital engagement takes less than nine hours in real time (7) they may be texting or playing a computer game while they stream music, for example.
Although parents often worry that teens spend too much time online, there is some research from 2017 from the University of Oxford (8) suggests that some screen time is beneficial for them. Their well-being increases as their screen time increases. (9) , this is only up to a certain point and then it becomes bad for you. It depends (10) how long they spend on the activity. It has been calculated that four hours and 17 minutes is the maximum amount of time that teens should spend on a computer on weekdays.

Let's complete the text by selecting the best answers from the given options. This exercise focuses on understanding context and choosing words or phrases that make the text coherent and grammatically correct.

The latest information (A) we have is that British teenagers now spend more than nine hours a day online. - Option A is correct because it aligns with the context that follows 'information' refers to possessing knowledge or data.
A number of UK teenagers, (C) whose ages were between 13 and 17, answered a series of questions about their screen habits. - Option C is correct because 'whose' is a relative pronoun used to indicate possession, referring to the ages of the teenagers.
They (B) told the researchers the amount of time they spent on social media websites. - Option B is correct because it captures the reporting action of the teenagers to the researchers, which fits the narrative context.
The average answer was one hour and 40 minutes a day, (D) which is approximately the same amount of time that they spend streaming videos and music over the Internet. - Option D is correct because 'which' is a relative pronoun that provides additional information about the average answer.
The 1,000 teens who took part in the survey also admitted (A) to spending an average of 72 minutes a day playing video games and 55 minutes messaging their friends. - Option A is correct because 'admit to doing something' is the correct grammatical phrasing.
One interesting thing we can see about today's teens, (C) when they are online, is that they are very good at multi-tasking. - Option C is appropriate here as it introduces a relative clause in a situation when something happens.
That means that their nine hours of digital engagement takes less than nine hours in real time (A) because they may be texting or playing a computer game while they stream music, for example. - Option A is correct because 'because' provides a reason or cause.
Although parents often worry that teens spend too much time online, there is some research from 2017 from the University of Oxford (B) that suggests that some screen time is beneficial for them. - Option B is correct because 'that' is used to introduce a clause or a statement.
Their well-being increases as their screen time increases. (D) However, this is only up to a certain point and then it becomes bad for you. - Option D is correct as 'however' is used to introduce a contrasting view or condition.
It depends (C) on how long they spend on the activity. - Option C is correct as 'depend on' is the correct verb phrase used to express the condition that affects another fact or situation.