Based on the code segment below, fill in correct code line using call by reference. void func (___-- --){ total = x * y; } O a. int &x, int &y, int &total O b. int x, int y, int total O C. int *x, int...

Extracted text: Based on the code segment below, fill in correct code line using call by reference. void func (___-- --){ total = x * y; } O a. int &x, int &y, int &total O b. int x, int y, int total O C. int *x, int *y, int *total O d. int (x), int (y), int (total)