Chastity and Shane Are Fraternal Twins,born 17 Minutes Apart

Chastity and Shane are fraternal twins,born 17 minutes apart.They go through many of life's trials and tribulations together,but if their developmental schedules hold true to average,Chastity will start going through her pubescent development approximately ___________ her brother.

A) at the same time as
B) 5 years earlier than
C) 3 years later than
D) 2 years earlier than