What Is Incorrect About the Following Function

What is incorrect about the following function?
Function sum(ByVal intX As Integer, ByVal intY As Integer) As Integer
Dim intAns As Integer
IntAns = intX + intY
End Function

A) intAns should not be declared inside the Function.
B) the as Integer at the end of the Function heading should be eliminated.
C) the function does not return a value
D) parameters intA and intB should be declared as ByRef