At the Peak of Her Weight Gain in Adolescence,Maud,age 12,gained

At the peak of her weight gain in adolescence,Maud,age 12,gained 18 pounds in one year.Research on weight gain during adolescence would indicate that Maud's weight gain is

A) excessive; she should have gained no more than 10 pounds.
B) a little less than normal; she should have gained 20-23 pounds.
C) average.
D) significantly below average; she should have gained approximately 25 pounds.