How could you have been so and foolish as totake their compliments seriously?

I believe the answer is: Naive
The word naive is used to describe an individual that is lack in wisdom and tend to believe everything that people say to him/her.
Naive individuals have inherent belief that all people have good intent and wouldn't cause any harm to them.

Provide additional information.

This question is an opinionated one, and we don’t know anything about the module or anything, thus we can not answer it. but if you are having trouble on what it is asking basically it is just asking to (using your knowledge on the topic) say which topics you were most interested and which were the most challenging.hope this : p