下列程序段运行后,其运行结果是（)。Dim a（3) As Integer, b（3) As IntegerFor k = 0 To 3a（k

下列程序段运行后,其运行结果是()。

Dim a(3) As Integer, b(3) As Integer

For k = 0 To 3

a(k) = k*k +k

b(k) = a(k)-k

Next k

Print a(2) + b(1)

A. 5

B. 6

C. 7

D. 8