单项选择题

设执行以下程序段时依次输入2,4,6执行结果为
Dim a(4) As Integer,b(4) As Integer
For k =0 To 2
a(k + 1) = Val(InputBox( "Enter data:" ) )
b(3 - k) =a(k + 1)
Next
Print b(k)

A.2
B.4
C.6
D.0