Que: The intSales array is declared as follows:Dim intSales() As Integer = {10000, 12000, 900, 500, 20000}.Which of the following If clauses determines whether the intSub variable contains a valid subscript for the array?

a. If intSales(intSub) >= 0 AndAlso intSales(intSub) < 4 Then

b. If intSales(intSub) >= 0 AndAlso intSales(intSub) <= 4 Then

c. If intSub >= 0 AndAlso intSub < 4 Then