As far as I understood, your answer is the very last option
Answer:
repitiTION
Explanation:
it repeats twice to emphasize more strongly (almost hyperbolicly) that the author "did not believe" this and that
Metaphor because you are comparing two things but not using like or as
Answer:
people doesn't pay credit card in the 1920s
Explanation:
hope that helps
Yes you can use i for your thesis