The external conflict which Portia wants Brutus to reveal to her is A. the struggle in his heart that is making him ill
This refers to the disagreement which occurs as a result of struggle between different forces in a given story.
Hence, we can see that external conflict is used to show that there is a struggle in the heart of Brutus as he contemplates murder and this is the external conflict which Portia wants Brutus to reveal to her
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