Multiple choice technology programming languages Which program is used to call the HC9999Cd program in M1 and M2 processing HC9999CC HC9999M1 HC9999CD HC9999M2 HC9999E0 Reveal answer Fill a bubble to check yourself A Correct answer Explanation When calling the HC9999CD program during M1 and M2 processing stages, the HC9999CC program serves as the calling program. This naming convention follows a logical pattern where the calling program (CC) invokes the target program (CD).