A school needs to hire 3 Math teachers, 4 science teachers, and 2 english teachers. They have 5 applications for math 7 applications for science and 9 applications for English. How many different ways can the principal meet his staffing needs for the upcoming school year?
A.)(5C3) (7C4) (9C2)
B.)(5P3) (7P4) (9P2)
C.)21C9
D.)21P9