Your friend should talk to his farther telling him what he wants and that it's his choice.
I believe that is an imperative sentence because it is giving a command.
Answer:
A
Explanation:
If you do B it might end up being confusing
If you do C there will barely be anything it will be too short
If you do D then towards the more boring parts people might just give up reading
But with A you can make the readers understand the situation more and make it feel more real and engaging