[单项选择题] 下列程序段的执行结果为______。 Dim A(4) n=3 A(1)=1 For k=0 To n-1For 1=1 To k+1X

[单项选择题] 下列程序段的执行结果为______。

Dim A(4)

n=3

A(1)=1

For k=0 To n-1

For 1=1 To k+1

X=k+2-1

A(X)=A(X)+A(X-1)

If k＜n-1 Then Exit For

Print A(X);

Next 1

Next k

A．1 2 1

B．1 2 3

C．2 4 6

D．1 3 1

B