Cotton-topped tamarins are small primates with tufts of long white hair on their heads. While studying these creatures, you notice that males with longer hair get more opportunities to mate and father more offspring. To test the hypothesis that having longer hair is adaptive in these males, you should .
A) look for evidence of hair in ancestors of tamarinsB) test whether males with shaved heads are still able to mateC) determine if hair length is heritableD) test whether other traits in these males are also adaptive