In act i, scene ii, why does cassius flatter brutus? he wants brutus to marry his daughter in march. he needs brutus to support his plot against caesar. he wants brutus to leave rome so caesar will retire. he fears that brutus may try to kill him or casca.

He needs Brutus to support his plot against Caesar.

Explanation:

In this scene, Cassius flatters Brutus because he wants him to join the conspirators. Cassius is planning to assassinate Caesar, and in order to do so, he wants help from all the "great men" of Rome, one of them being Brutus. Although Brutus eventually agrees, he will come to regret his decision later on in the play.

I wanna say B, because it combines all the options without leaving anything out.