What is displayed when the button is clicked on?
```
Private Sub btnDisplay_Click(...) Handles btnDisplay.Click
Dim a, b as String
Dim x as Integer
a = "How now brown cow."
b = "brown"
x = FindIt(a, b)
txtBox.Text = CStr(x)
End Sub
Function FindIt(z1 as String, z2 as String) As Integer
Dim x as Integer
x = z1.IndexOf(z2)
End Function
```
(A) "How now"
(B) 8
(C) 0
(D) An error
(E) None of the above
(C) 0
Computer Science & Information Technology
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