Sandra Has Been Informed by a Pediatrician About the Weight

Sandra has been informed by a pediatrician about the weight gained by her four-year-old son,Manuel,over the last one year.She learns that Manuel has gained six pounds.Sandra should:

A) be alarmed because this is too much weight gain.
B) be concerned because this is too little weight gain.
C) be positive and change Manuel's diet.
D) be content that this is normal for Manuel's age.