This is a scene for the play
Answer: A) ...life is not a spectator sport
The example of an imperative sentence is D. Please remember to get the dry cleaning.
An imperative sentence is there not to inform, but to order somebody to do something. Although using the word <em>please </em>makes it sound less of an order, you are still telling somebody to do something - in this case, not to forget to get the dry cleaning.
A is an interrogative sentence, whereas B and C are declarative.
The most likely audience and purpose is "A" students and to persuade.