Answer:
A). his external conflict with Cassius.
Explanation:
A conflict is depicted as the disagreement between two contradictory forces like the character versus the society, the character versus his inner self, the character versus nature, etc. While an external conflict is a clash between a character and an external or outside force.
In the given excerpt from Shakespeare's popular text 'Julius Caesar,' "Brutus' external clash with Cassius is narrated." This opposition or disagreement is clearly reflected through Lucillius' cold welcome from Cassius' side that led to an unexpected response from Brutus saying that the association between them is over now post Caesar's murder. Thus, option A is the correct answer.
