Which statement gives evidence for Brutus's tragic flaw in The Tragedy of Julius Caesar?

Brutus’s tragic flaw is that he is too trusting and can be persuaded by others, which leads him to make poor decisions. For example, Cassius manipulates him into joining the conspiracy against Caesar. This makes A, “Brutus is easily manipulated and persuaded by others,” the best evidence of his flaw. The other choices describe events or the audience’s response, not the flaw itself.

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