Which of these statements is true about sperm and egg cells?
a) sperm and egg cells are made during mitosis.
b) sperm and egg cells have as many chromosomes as any other kind of cell.
c) sperm and egg cells are made during meiosis.
d) sperm and egg cells are about the same size.

The correct statement would be option C. Both of these are gametes and or sex cells, and are produced during the process of meiosis. Since meiosis tends to reduce the number of chromosomes present in producing the gametes, so that upon fusion we can obtain a correct diploid or other polyploid organism. This is why it is produced via meiosis.