Question

How does this scene contribute to the plot?

It gives Brutus and the others an excuse to drop the plan.
It shows that Brutus and the others are afraid.
It illustrates Brutus’s resolve and commitment.
It exemplifies Brutus’s mistrust of the other men.

Answer 1

"It illustrates Brutus’s resolve and commitment."

Reason: in the relevant scene Brutus moves from doubt to decisive action — he rationalizes killing Caesar as necessary for Rome, accepts the burden of the deed, and refuses to be swayed into abandoning the plot. The other options fit less well: the scene doesn't give a real excuse to drop the plan, it isn't mainly showing fear, and while Brutus later distrusts some conspirators, this scene emphasizes his moral determination more than mistrust.