Indicate Which Item in the Following Answer Code Best Matches

Indicate which item in the following answer code best matches the description in each question by writing the appropriate letter in the blank. There is only one correct answer per question. Each answer may be used more than once. Some answers may not be used at all.
-Responsible for final maneuvering for penetration of ova.

A) erection
B) acrosome
C) Leydig cells
D) seminal vesicles
E) oviduct
F) uterus
G) inner cell mass
H) seminiferous tubules
I) midpiece of sperm
J) head of sperm
K) vagina
L) prostate gland
M) trophoblast
N) corpus luteum
O) epididymis
P) ovaries
Q) ejaculation
R) tail of sperm
S) Sertoli cells
T) endometrium
U) placenta