有如下VB程序段：

Dim i As Integer, s As Integer

Dim a (1 To 10)As Integer

For i =1 To 10

a(i)=i^2

If a(i)Mod 3=0 And a(i)Mod 5 =0 Then s= 50000+ a(i)

If a(i)Mod 3=0 Or a(i) Mod 5 =0 Then s =s+ a(i)

Next i

Text1. Text Str(s)

执行该程序段后，下列说法正确的是（  ）

A、文本框Text1中显示“251”

B、文本框Text1中显示“126”

C、程序报错，提示“下标越界”

D、程序报错，提示“溢出”