Answer:
C- Brutus decides to join the conspiracy against Caesar because he fears that Caesar will become ruthless once he has absolute power
Step-by-step explanation:
"It must be by his death: and for my part
I know no personal cause to spurn at him
But for the general. He would be crowned:
How that might change his nature, there's the
question."
"That at his will he may do danger with.
Th' abuse of greatness is when it disjoins
Remorse from power."
Brutus is saying that he fears Caesar's nature will change and that power will corrupt Caesar into becoming a ruthless dictator. Because of his fear, Brutus decides to join the conspiracy against Caesar and kill him.
Have a lovely rest of your day! :)