Wang Shu Lives in China and Her Cousin Hei Ryung

Wang Shu lives in China and her cousin Hei Ryung lives in South Korea.According to your textbook, which statement is true regarding timing of the girls' menarche?

A) Asian females experience menarche much later than girls from other countries.
B) Due to her genetics, Wang Shu will experience menarche much earlier than Hei Ryung.
C) Wang Shu and Hei Ryung will experience their first menarche after the age of 18.
D) Because China and South Korea are experiencing rapid economic development, both girls are likely to experience their first menarche before age 15.