Which of the Following Statements Is True

Which of the following statements is true?

A) In the United States,most girls do not begin puberty until they are 14 years of age.
B) By the time he reaches 16 years of age,a healthy boy's skeletal development is complete.
C) A healthy girl's skeletal growth is almost complete about 2 years after she begins menstruating.
D) In the United States,healthy boys begin puberty between 14 and 16 years of age.