The correct option is D Spermatids change into spermatozoa
In testis, the immature male germ cells (spermatogonia) produces sperms by the process of spermatogenesis, that begins at puberty. During spermatogenesis, the spermatids are transformed into spermatozoa (sperms) by the process called spermiogenesis. After spermiogenesis, mature spermatozoa are released from the seminiferous tubules by the process called spermiation. Thus, the correct answer is option A.