US History vs Biology (E or M)

<p>Which should I do? I took Biology as a class a year ago a year ago :P, and just finished US history class with a 4 on the exam. Is US History easier anyway? Also, which book is best for US?</p>

<p>if you are good at Biology, I recommned that you take the SAT II test because it is not that difficult. But to prepare for the exam, you should read over the Barrons SAT II bio book, because that helped me a LOT.</p>

<p>Any suggestions for good US History books?</p>