Is It True That Your Body Is Mostly Made Up

Is it true that your body is mostly made up of your own cells?

A) Yes, most of the cells making up your present body originated with you.
B) Yes, but there are a lot of bacterial cells and other organisms that live on you, too.
C) Yes, all of cells making up your present body originated with you.
D) No. The majority of "your" cells are bacteria or other organisms living on you.
E) There is no way to really distinguish "your" cells from other cells living in or on you, so the answer to this question is not clear.