Suppose you want to verify that the user has entered a value into a text box named txtInput. Which of the following code segments responds with an appropriate message if the user does not enter a value?

Question

a.``` If txtInput.text <> "" Then
lblStatus.Text = “No data has been entered”
End If
```
b.``` If txtInput.Text = " " Then
lblStatus.Text = “No data has been entered”
End If
```
c.``` If txtInput <> String.Empty Then
lblStatus.Text = “No data has been entered”
End If
```
d.``` If txtInput.Text = String.Empty Then
lblStatus.Text = “No data has been entered”
End If
```

Answer 1

d.``` If txtInput.Text = String.Empty Then
lblStatus.Text = “No data has been entered”
End If
```