Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'sac of scrotum'?

A. The posterior pituitary (or neurohypophysis) comprises the the concept of the pituitary gland and is part of the endocrine system. Despite its name, the posterior pituitary gland is not a gland, per se; rather, it is largely a collection of axonal projections from the hypothalamus that terminate behind the anterior pituitary gland. [WP,unvetted].
B. Any of the two testis-carrying compartments of the scrotum.
C. The the concept is one of a pair of sponge-like regions of erectile tissue which contain most of the blood in the clitoris during clitoral erection. This is homologous to the the concept penis in the male; the body of the clitoris contains erectile tissue in a pair of corpora cavernosa (literally 'cave-like bodies'), with a recognisably similar structure.
D. A patent pouch of peritoneum extending into the labia majora of women. It is analogous to the processus vaginalis in males. The pouch accompanies the gubernaculum during development of the urinary and reproductive organs, more specifically during the descent of the ovaries, and normally obliterates.

Answer: Any of the two testis-carrying compartments of the scrotum.