Menarche Typically Occurs Around _______ Years of Age; Its Timing

Multiple Choice

Menarche typically occurs around _______ years of age; its timing reflects __________.

A) 10 or 11; mostly the effects of nature
B) 10 or 11; the effects of both nature and nurture
C) 12 or 13; mostly the effects of nature
D) 12 or 13; the effects of both nature and nurture