Could you clarify that?

Consider the following code in some hypothetical language. int z = 1 void assign (int x) { x = x + 1; z = z + 2; } int main() { assign (z); print(z); } Which one of the following is the output of the program using pass-by-value, pass-by-value-result and pass-by- reference parameter passing? Answers: 3 with pass by value. 4 with pass by reference, and a. 2 with pass by value-result 3 with pass by value, 4 with pass by reference and b. 1 with pass by value-result 1 with pass by value. 4 with pass by reference, and c. 2 with pass by value-result 3 with pass by value, 4 with pass by reference, and 4 with pass by value-result d