The phrase from the excerpt that suggests that Krogstad is prone to engage in crime and may, in fact, be a criminal is the following one:
diseased moral character
It is the only option that talks about somebody being a bad person, which is what Krogstad is. The other options do not show that moral ambiguity this option does.
Benjamin Franklin- an autobiography is a biography you write by yourself about your own life
D because the book has real facts and is pretty accurate
Cause that’s the first thing they see and what they see is gonna set an entire persona in their head you know