Which SAT II should I take/retake?

<p>So far, I have taken US History (750), Math II (660), and Bio (670).</p>

<p>I'm unhappy with my Math and Bio scores and I know I should retake them. However, my interests lie in International Relations and Political Science so I am not quite sure why I took those tests in the first place.</p>

<p>My question is, should I retake Math II and Bio, or should I take new ones in something more relate-able to my intended majors, such as world history or Chinese (I'm Chinese). If I take different tests, won't a 660 and 670 look bad to competitive schools? And if I retake Math and Bio, would the higher score replace the 660/670?</p>

<p>I plan on applying ED I to Vanderbilt but I'm also looking at schools like Tufts and Georgetown for reference.</p>

<p>Thanks for reading and any help given! :)</p>