Anne Is Investigating the Timing of the Onset of Puberty

Anne is investigating the timing of the onset of puberty in a large sample of adolescents.In her sample, she finds the correlation for identical twin pairs is almost twice that of fraternal twin pairs, which in turn, is almost twice that of singleton siblings.Based on this information, what can you conclude regarding the potential cause of pubertal timing?

A) Heredity plays a strong role in physical maturation.
B) Environmental factors play a strong role in physical maturation.
C) Genetic regulation of hormones is the trigger for physical maturation.
D) Environmental factors play a primary role in physical maturation.