Act 1 of The Tragedy of Julius Caesar

What plan to get Brutus to join his cause does Cassius put into effect at the end
of Act I of The Tragedy of Julius Caesar?

A. to talk to Brutus until he finally gives in to Cassius' agenda
B. to place letters expressing citizens' support for action in places where
Brutus will find them
C. to enlist Brutus' friends and family in an effort to convince him to side with
Cassius
D. to share secrets about Caesar's behavior that will spur Brutus to action