A Study Was Carried Out to Determine the Age at Menarche

A study was carried out to determine the age at menarche in young female gymnasts. Gymnasts were split into two groups based on their devotion to the sport: competitive gymnasts and leisure gymnasts. Assuming that age at menarche is normally distributed, which of the following is closest to the probability that a randomly chosen competitive gymnast will have onset of menarche at age 16 and more?

A) 0) 997
B) 0) 950
C) 0) 680
D) 0) 160
E) 0) 025
F) 0) 0015