Correct option is A
Explanation:
"Please close the door" is the correct active-voice counterpart for the passive "You are requested to close the door." Both express a polite request.
Information Booster:
Active voice is direct, clear, and carries the subject directly engaging in the action. Passive constructions often formalize or soften commands.
Additional Knowledge:
(2) Is grammatically incorrect.
(3) "Let the door be closed" is passive, but not a direct transformation of a request.
(4) Irrelevant to the sentence’s meaning.