Would Switching the Special Case Order Affect the Return Value

Multiple Choice

Would switching the special case order affect the return value of the following method? public int mystery(int n, int m)
{
If (n == 0) // special case #1
{
Return 0;
}
If (n == 1) // special case #2
{
Return m;
}
Return m + mystery(n - 1, m) ;
}

A) No
B) Yes
C) It is impossible to tell.
D) An exception will be thrown.