Prep phrases in the beginning of a sentence are separated from the independent clause by a comma.
after a long civil war that devastated his native nigeria (prep), the main character in civil peace rebuilds his life.
internal clauses will also be separated with commas when they do not flow logically with the rest of the independent clause.
elie wiesel (ind. clause), recalling his suffering in the nazi concentration camps (int. clause), often spoke out against similar oppression (continued ind. clause).
So the question ask to choose which among the following is the value of Lost Generation writers that is present in Soldier Home and the answer would be letter A. a general disillusionment with war. I hope you are satisfied with my answer