Sheila (A Girl) and Brian (A Boy) Are Fraternal Twins

Multiple Choice

Sheila (a girl) and Brian (a boy) are fraternal twins and are 8 years old. If their development is typical, their parents should expect that they will experience the adolescent growth spurt in which of the following patterns?

A) Sheila and Brian will both experience the growth spurt at about the same time.
B) Sheila will experience the growth spurt about 2 years before Brian does.
C) Sheila will experience the growth spurt about 1 year after Brian does.
D) Sheila will experience the growth spurt about 2 years after Brian does.