Ava and Alexander Are Fraternal Twins Born 17 Minutes Apart

Ava and Alexander 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, Ava will start going through her pubescent development approximately __________ her brother.

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