Arranging your notes into categories
The man in the jail house tried to kill or find trouble for Tom Robinson. Luckily Atticus was there and Jem had the idea of following his father because he was worried. Scout later then solved the issue by mentioning Mr Cunningham's trail (or some sort I forgot) and they all realised that Atticus is just trying to do his job and justify the person like how he treats them. At last they went back and Tom wasn't harmed.
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.
