The answer is B, because the verbs aren't parallel... If the sentence were correct, it would turning... gaining... gently riding
Cassius wants brutus (Caesar's nephew) to kill Caesar in the senate house with a whole bunch of other senators...
The sentence would be a compound sentence, I believe.
I would say either A or C. Well sounds better. C
The King and Queen are the antagonist. If you are looking for that what exactly is the question?