单项选择题

A.if(D2>=5000,D2*10%,if(D2>=3000,D2*5%,0))
B.if(E2>=5000,E2*10%,if(E2>=3000,E2*5%,0))
C.if(D2>=5000,D2*10%,D2>=3000,D2*5%,0)
D.if(E2>=5000,E2*10%,E2>=3000,E2*5%,E2<30000,0)