The answer is "more" because they said both more and frequent which are synonyms
It's when someone makes a fast and false conclusion because they only know the general idea of the thing they are concluding, and not all of the facts, if that makes sense. It's kind of like a stereotype, automatically assuming that someone is a certain way just because they participate in a certain sport, for example.
Well, since Elaborate is a synonym for explain, I would guess that the student would just have to explain more about the topic.
