Which of the following statements most detracts from the claim that the human appendix is a completely vestigial organ?
(A)The appendix can be surgically removed with no immediate ill effects. (B)The appendix might have been larger in fossil hominids. (C)The appendix has a substantial amount of defensive lymphatic tissue. (D)Individuals with a larger-than-average appendix leave fewer offspring than those with a below-average-sized appendix.
C