Consider the Following Definition of the Recursive Function Mystery $\quad$ Return 0;
Else If (Num % 2 == 0)

Consider the following definition of the recursive function mystery.
int mystery(int num)
{
if (num <= 0)
$\quad$ return 0;
else if (num % 2 == 0)
$\quad$ return num + mystery(num - 1) ;
else
$\quad$ return num * mystery(num - 1) ;
}
What is the output of the following statement?
Cout << mystery(5) << endl;

A) 50
B) 65
C) 120
D) 180