C++ 9. If we call a function with the statement blotch(blue, green) what purpose do blue and green serve? a. they are "arguments" we're passing to the function blotch() b. they are the addresses of the function and the calling program c. they are the addresses of the variables which we want blotch() to be able to access and/or modify. d. they are the addresses of library routines needed by the function.