In Yusef Komunyakaa's "Camouflaging the Chimera", the soldiers are <em>B. Preparing to fight.</em> In Komunyakaa's "Camouflaging the Chimera", the narrator tells us about the effort that American soldiers did to look like animals and blend in. The soldiers in Vietnam made a tremendous effort to blend with their surroundings, just as animals do to avoid being attacked by other animals "We tied branches to our helmets. We painted our faces and rifles with mud from a riverbank,...". These efforts were made to prevent the enemies from seeing them and so that they could launch a surprise assault on Vietnamese troops.
I believe there is a mistake in your choices, because I don't see the correct choice here. The correct answer should be ABAB ABCB.
This is because in the first stanza, the first line A (son) rhymes with the third line A (shun), and the second line B (catch) rhymes with the fourth line B (Bandersnatch) - which makes the first stanza ABAB.
In the second stanza, the first line A doesn't rhyme with anything (hand), the second line B (sought) rhymes with the fourth line B (thought), and the third line C doesn't rhyme with anything - which makes the second stanza ABCB.