1) Prefix "a-" means "without, not". The meaning of the word "apathetic" is "without emotion or feeling";
2) In the word "analgesic", prefix "a-" denotes the process of removing or eliminating something. So, "analgesic" means "a medicine to remove pain";
3) Prefix "ex-" has the meaning "out". That is why, the word "expulsion" is defined as "to drive out";
4) Prefix "endo-" means "inside, within". Consequently, "endodermis" is the name of the inner layer of skin.
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.
Answer: The main idea is the point of the paragraph. It is the most important thought about the topic.
Explanation: