Answer:i think satisfying
Explanation:its not really right but if
The main reason why Gene changes his mind about enlisting in the military after he tells Brinker he will is because "<span>D)Gene doesn't want to leave Devon because Finny has returned" since they are quite attached. </span>
"mankind was my business"
I am not exactly sure what you mean by that but I think the answer you are looking for is:
it is a motto, usually used to bring people together. Strength in numbers. two is better than one