函数过程F1的功能是：如果参数b为奇数，则返回值为1，否则返回值为0。以下能正确实现上述功能的代码是

A．Function F1(b As Integer)If b Mod 2=0 ThenReturn 0ElseReturn 1End IfEnd Function
B．Function F1(b As Integer)If b Mod 2=0 ThenF1=0ElseF1=1End IfEnd Function
C．Function F1(b As Integer)If b Mod 2=0 ThenF1=1ElseF1=0End IfEnd Function
D．Function F1(b As Integer)If b Mod 2＜＞0 ThenReturn 0ElseReturn 1End IfEnd Function