单项选择题

A.=SUM(F1:F2,F4:F6,C3:E3)
B.=SUM(G1:G2,G4:G6,D3:F3)
C.=SUM(G3:G4,G6:G8,D5:F5)
D.=SUM(G2:G3,G5:G7,D4:F4)