VB Program | What will be the output of the following program when the button is clicked?

Private Sub btnDisplay_Click(...) Handles btnDisplay.Click
Dim word, result As String
word = "Benjamin"
result = Rotate(word)
result = Rotate(result & word)
result = Rotate(result)
txtBox.Text = result
End Sub
Function Rotate(ByVal var As String) As String
Dim varlength As Integer
varlength = var.Length
Return var.Substring(1) & var.Substring(0, 1)
End Function
A. jaminBBenjaminen
B. BenjaminBenjamin
C. njaminBe
D. None of the above

Ans: A