Consider the following code. Why would you get identifier not found errors?

int main()

{ int num1 = 1; int num2 = 2; int total = 0; std::cout << "total = " << total << std::endl; total = addition(num1, num2); std::cout << "After addition(num1, num2), total = " << total << std::endl; }

int addition (int a, int b) { int r; r = a + b; return r; }

A. Because the function call does not match the function definition.

B. Because variable a is not defined in the body of the even and odd functions.

C. Because the function is not declared prior to the function call. Their prototype is needed above main.

D. Because the variable i is not initialized to a valid integer value before it is used.