A large box of disposable diapers contains 150 diapers. Baby Bianca used 9 boxes during her first year and 7 boxes during her second year. If the average baby uses 4,500 diapers by age 2, how many fewer diapers did Bianca use than the average baby
A. 3,150 fewer diapers B. 2,400 fewer diapers
C. 2,100 fewer diapers D. 2,200 fewer diapers