Which statement is the best analysis of what causes Casca to join the conspiracy?

Cassius works on Casca by appealing to his fears and resentment of Caesar, and by arranging for forged letters that make it seem the Roman people want Brutus to act. These tactics stir Casca’s emotions and help draw him into the plot. Brutus’s involvement matters to Casca, but Cassius’s manipulation is the best overall explanation.

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