What is the tone in Stephen Crane's "A Great Mistake"? A. The narrator's tone is terse and disinterested.
B. The narrator's tone is skeptical, angry.
C. The narrator's tone is full of suspense yet amusement.

you need to explain that more, your grammer just needs to be close to perfect.

the answer should be d) he was one of those young thousands who greeted the war with a certain amount of relief, welcoming the liberation from webs of tangled emotion" since it is the best option because it shows his desire to free himself. 

hope this answer you! have a great day.

i think the answer is b

i believe it is the first choice (1.)

because the major theme is(“both the wild and civilization have rules.”)

and also as u said,( based on what buck learns within the call of the wild, "both the wild and civilization have rules".this is true of humans within society as well.