Isaac's Parents Are Concerned That Their Son Does Not Eat

Isaac's parents are concerned that their son does not eat enough. They often tell him that he ate more as a baby than he does at the age of 6. You can reassure Isaac's parents by telling them that Isaac does not eat as much as he did when he was a baby because he __________.

A) has become a picky eater
B) would rather be out playing with his friends
C) is not growing as fast and does not require so many calories
D) does not have the desire to eat