Studying with Jeopardy

After playing the Jeopardy games today I found that I did the best on questions about demography and agriculture but didn't do as well on the questions based on politics. One of the more difficult questions i came across was "This is the term that is used to describe Pope Gregory I assertion that the bishop of Rome is the head of the church." The answer was papal primacy. I think I was confused about this question because of it's specific nature. I learned from this question that I need to refine my studying more to some specific things, but at the same time not to focus on them too much because there is a lot of material to study.