Sadly, Captain Canot didn't believe that the treatment of slaves was a problem. Like most people in his time, it was common to think of slaves as only sub-humans. To Captain Canot he was just carrying regular old cargo that just so happened to be alive and breathing.
Captain Canot was a person who captured slaves to make them work for him, he gave them little privileges and had zero qualms about it.
(I wasn't able to get access to any text for a clearcut example, but essentially you're supposed to find an example in whatever text you are reading to support that he was completely ok with slavery. Like, in what ways did he explicitly imply that slavery is a good thing, or what actions and feelings do he have towards it being a thing? And then explain it.)
Answer:
The correct answer would be option b:"The author once felt pride and optimism about the war".
Explanation:
In the excerpt, the author says that "he was proud of the young American pilots sitting at the controls in the cockpit" and that "he was grateful for the opportunity to witness this adventure and report it".
It just says that he was excited to get on a U.S Army helicopter, it does not say nor infer that is was his first flying experience, therefore, option a is incorrect.
It doesn't say and it cannot be inferred that the U.S soldiers are trained in hand to hand combat, so option c is also incorrect.
The author barely mentions the Vietcong guerillas, and he does not seem to have any respect for them since he was excited about war, so option d is also incorrect.
The word "gives" indicates the cause because it is showing what the cause does. Hope that helps :)