Which of the Following Statements About Menarche Is NOT True

Which of the following statements about menarche is NOT true?

A) Menarche typically occurs two years after the beginning of indicators such as changes in the breast and pubic hair.
B) In industrialized countries, the average age of menarche has remained fairly stable for the last 100 years.
C) Girls now show signs of secondary sex characteristics one or two years earlier than their mothers and grandmothers.
D) Girls who are sexually active are more likely to have experienced early menarche.