I belive it would be C because Internal conflict is a problem on the physical side and as it says "Henry struggles to...fight along with his men..." which is something you don't do with your mind it is with your body.
Explanation: When you use different words in different tenses, it makes you think about the time these events took place. If I said “I walked yesterday” that was in the past but if I say “I’m walking” you know that’s present tense
