DSST Astronomy or Environment and Humanity

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I need to meet one more science requirement after having failed CLEP Biology. Any suggestions from those of you who have taken these, had to make the same decision or know of others in this situation? I am NOT a science girl at all. I passed DSST Here's to Your Health without much fuss (especially compared to the torture I put myself through with Biology) and would really like another one that may come to me more naturally like the health one did.

Any advice/thoughts is much appreciated!!