Question

Which XXX is valid for the following code? int CalcSum(int a, int b) { return a + b; } int main() { int y; XXX return 0; }a.
y = CalcSum();
b.
y = CalcSum(4, 5);
c.
y = CalcSum(4 + 5);
d.
CalcSum(y, 4, 5);