Answer :
Final answer:
The correct replacement for the sentence is 'This door will remain unlocked when the office is occupied'. This choice adds a subject and verb to make the sentence grammatically correct.
Explanation:
The correct sentence that should replace the incorrect sentence 'This door to remain unlocked when occupied.' is 'This door will remain unlocked when the office is occupied.' The given sentence is not grammatically correct and option 'a' fixes this issue by adding a subject and verb to the sentence, making it more clear and comprehensible.
This revised sentence effectively communicates the intended message that the door will be unlocked only when the office is occupied, a crucial piece of information for understanding the security protocol. In writing and communication, ensuring proper sentence structure is essential to convey ideas accurately and comprehensibly.
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