Help please Which event from Julius Caesar causes Cassius to believe Caesar is weak and unfit to rule Rome?

Caesar once called on Cassius to save him from drowning because he could not save himself.

Caesar defeats Pompey at battle with Cassius's help, but does not reward Cassius.

Caesar is offered the crown three times by the people of Rome and turns the opportunity down every time.

Caesar makes a joke of the Soothsayer that Cassius brings forward to warn Caesar of danger.