要想从过程调用后返回一个整数型结果,则下列过程说明正确的是()

要想从过程调用后返回一个整数型结果,则下列过程说明正确的是()
A、Sub f1 (Byval x As Single) As Integer
B、Function f2 (Byval x As Integer) As Single
C、Sub f3 (x As Integer) As Single
D、Function f4 (x As Integer) As Integer
【正确答案】:D