The answer is the amputation of the lieutenant's arm. None of the other options are events in the story. The lieutenant returns home and we don't know the outcome of the battle. There is also no evidence he was ever ill.
A, because all the other are in direct reference to something
When peers pressurize an individual, indirectly or directly, into doing something dangerous, illegal, or evil deed, it is known as peer pressure The most common example of peer pressure among youngsters is underage drinking, substance abuse, smoking, performing dangerous stunts, etc. Most adolescents give in to peer pressure because they don’t want to get on anyone’s wrong side, and they want to fit in. Listening to his gut and believing in himself, learning to say no, think a lot before making any decision are all the pointers that a kid should keep in mind to avoid peer pressure. Teachers and parents should interact with the children to trust their adults and alert them if they face peer pressure. The children should befriend someone who has already met peer pressure and resisted it to aid them in facing such situations. Peer pressure is faced by individuals of all genders, ethnicities, and ages, so it is tough to resist. As adolescents think they can make an independent decision because they have grown up physically, they are easily influenced by peer pressure. Peer pressure can be faced either face-to-face or through digital platforms, as social media provides them with opportunities. If a youngster is unable to resist peer pressure, it might ruin his future, including his studies and career, so it is necessary to fight it when possible.
He was afraid that he world be late for school