<p>I would say US Gov’t since it’s the only one I did self-study for.<br>
I actually (in my sheer laziness) did not make it through the whole prep book but rather managed to memorize the definitions of everything and the landmark supreme court cases the day before. Since I write essays fairly well and took US history, I found that was enough to secure a 5 as did another one of my friends. Ironically it was the exam I felt most confident about when leaving the room.</p>
<p>I can’t say from experience but I have also heard that APES and Human Geo are quite easy to self-study.</p>