单项选择题

下列程序段的招待结果是______ 。 s=0 t=0 u=0 For i = 1 To 3 For j = 1 To i For k = j To 3 s=s+ 1 Next k t=t+1 Next j u=u+ 1 Next i Print s; t; u

A.14 6 3
B.6 14 3
C.9 8 7
D.8 9 10