A . Required component (II): Must be achieved. These are specific and generic goals that are mandatory for reaching a particular maturity level.
B . Expected component (III): Will typically be implemented. Expected components include specific and generic practices, which provide guidance on how to achieve required goals.
C . Informative component (I): Supports the understanding. Informative components provide details that help organisations understand and implement the required and expected components effectively, such as sub-practices and example work products.
Reference:
"TMMi distinguishes between required, expected, and informative components, with each serving a specific purpose in the model".