Well, the whole novel is basically told through these letters, so they are used to advance the plot an offer some sense of authenticity to an implausible story. Plus, it is a way for them to express their own feelings and thoughts about the whole thing.
Answer:
I think the answer for a is able to change status
and what I think gives it away is when it says," Stuck in a limited role"
Explanation:
The influence of world war 1 on world war 2 is the most appropriate cause and effect essay topic for which chronological order is important.