单项选择题

以下程序段的输出结果为  Dim 1,a(10),p(3)  k=5  Fori=0 To 10    a(i)=i  Next i  For i=0 To 2    p(i)=a(i*(i+1))  Next i  For i=0 To 2    k=k+p(i)*2  Next i  Frint k

A.20
B.21
C.56
D.32