Answer :
Final answer:
The correct placement of the comma after the introductory word in the sentence is crucial for clarity and proper punctuation.
Explanation:
The correct placement of the comma in the sentence is:
- Mary, please fold the blanket and put it on the bed in the guest room upstairs.
Placing a comma after the introductory word 'Mary' is necessary to separate it from the rest of the sentence.
Learn more about Comma placement in sentences here:
https://brainly.com/question/45214912