In Gametogenesis in Both Human Males and Females

In gametogenesis in both human males and females:

A) diploid stem cells are the precursors to haploid gametes.
B) stem cells form during embryonic development and divide by mitosis.
C) all primary spermatocytes and primary oocytes divide by meiosis.
D) secondary spermatocytes and secondary oocytes form by meiosis from primary spermatocytes and primary oocytes.
E) secondary spermatocytes and secondary oocytes undergo both meiotic divisions in quick succession to produce mature gametes.