Why the testes in human beings and mammals are situated outside the abdominal cavity within a pouch called scrotum ?

Options

A. There is not enough space in the pelvic area for the testicless to be housed internally
B. The scrotum helps in maintaining the low temperature of testes , `2.5^(@)C` lower than normal body temperature required for spermatogenesis
C. The scrotum helps in maintaining the high temperature of testis `2.5^(@)C` higher than the normal body temperature required for spermatogenesis
D. Providing more space for the growth of epididymis

Answer

B