PLEASE IF YOU HAVE READ TWELFTH NIGHT !
Ok I am in a hurry here and i need help with some questions. Here is the first,

Why does Viola help Duke Orsino try to win Olivia when Viola is in love with him herself?

A.
Viola wants Duke Orsino to be happy.

B.
Viola is mourning her twin brother, Sebastian, whom she believes to be dead.

C.
Viola needs a reason to leave Illyria.

D.
Viola knows that Duke Orsino will give up on Olivia once he gets to know her better.