Which of the Following Are Similar Between Spermatogenesis and Oogenesis

Which of the following are similar between spermatogenesis and oogenesis in vertebrate animals? Both oogenesis and spermatogenesis ________.
I.begin at the onset of sexual maturity
II.result in the production of four functional haploid cells from one diploid cell
III.lead to the production of gametes from germ cells
IV.are complete at the time of birth

A) Both I and II
B) Both III and IV
C) Both II and III
D) Only III