The correct answer is: A. the type of variable returned by the function to the function that calls it.
The header of a function is a line of code that defines the function’s name, parameters, and return type. The return type is the type of data that the function will return to the calling function. The types and names of any variables that will be passed to the function are also included in the header. The name of the program or function that calls the function is not included in the header.
Here is an example of a function header:
int add(int a, int b) {
return a + b;
}
In this example, the function name is add, the parameters are a and b, and the return type is int. The name of the program or function that calls the function is not included in the header.