Which of the Following Procedures Would Decrease a Man's Chance

Which of the following procedures would decrease a man's chance of impregnating a woman,yet still leave him the potential to produce children later in life?

A) If the man had his vas deferens surgically severed
B) If the man had his testicles removed
C) If the man had his epididymis removed
D) If the man had his seminal vesicle removed
E) None of these methods would decrease his chances of impregnating a woman but still leave him the potential to produce children later in lifE.