Tom Was Overweight When He Was 13

Tom was overweight when he was 13.During puberty he continued to gain weight steadily until at age 23,when he decided to lose weight.Tom successfully lost 50 pounds.Which of the following most likely happened to Tom's fat cells?

A) They shrank in size but did not decrease in number
B) They melted away when he burned all the excess fat
C) They decreased in number but did not decrease in size
D) They changed very little since fat cells shrink only with a weight loss greater than 100 pounds