Which of the Following Explains Why It Is Hard to Learn

Which of the following explains why it is hard to learn much about the childbirth experiences of other cultures?

A) Childbirth usually occurs in a hospital and outsiders are not permitted.
B) Childbirth is a personal, private event not readily discussed with outsiders.
C) Childbirth is of such little importance that it is not considered worthy of discussion.
D) Most cultures do not have words in their vocabularies to describe childbirth.