Osman Is a Junior High Student Anticipating Puberty

Multiple Choice

Osman is a junior high student anticipating puberty. He wants to know when puberty will start and how long it will take until he looks like and is considered an adult. His health teacher tells him that the timing and rate of puberty

A) is highly variable and influenced by both genetic and environmental factors.
B) is highly predictable, beginning around 12 years of age and taking four years to complete.
C) can be accelerated through good nutrition and excessive exercise.
D) is determined more by his environmental and family situation than genetics.