Complete the Following Code Snippet, Which Is Intended to Determine

Complete the following code snippet, which is intended to determine if a value is even or odd using mutual recursion:
Public static boolean isEven(int n)
{
If (n == 0)
{
Return true;
}
Else
{
Return isOdd(Math.abs(n) - 1) ;
}
}
Public static boolean isOdd(int n)
{
If (n == 0)
{
_________
}
Else
{
Return isEven(Math.abs(n) - 1) ;
}
}

A) return true;
B) return false;
C) return isOdd(Math.abs(n) -1) ;
D) return isOdd(Math.abs(n) ) ;