Which of the following is not a maturity level in CMM ? a- Repeatable. b- Design. c- Managed. and why?

I don’t know, The answer is managed or design because In the lecture in my course the levels is:- Level 1 - Initial.. Level 2 - Managed.. Level 3 - Defined.. Level 4 - Quantitatively Managed.. Level 5 - Optimizing

please help