HelpMePleaseGuys

I just had a Systems Architecture exam and this was really bugging me, can anyone confirm the answer? I put CISC but I'm now thinking I was wrong...

Hi guys I have this question I do not understand? Which of the following is NOT an advantage of CISC architecture? A. Specialist instructions to aid the programmer in common tasks B. Rich variety of addressing modes to aid the programmer C. Variable instruction lengths to optimise code density D. Fixed length, regular format instructions F. Specialist instructions that can be optimised in hardware Thank you in advance!!!