Research on trends in puberty often focuses on the age of menarche because
A. pubertal trends change more for girls than for boys.
B. it is the earliest sign of puberty in girls.
C. it is a definite event that is usually noticed and remembered.
D. sexual development in boys happens more slowly and gradually.
Answer:C
Research on trends in puberty often focuses on the age of menarche because
A. pubertal trends change more for girls than for boys. B. it is the earliest sign of puberty in girls. C. it is a definite event that is usually noticed and remembered. D. sexual development in boys happens more slowly and gradually.