Final answer:
ROC-MC allows for commercial operations while ROC-M does not.
Correct option is A.
Step-by-step explanation:
The difference between ROC-M and ROC-MC certificates is that ROC-MC allows for commercial operations while ROC-M does not. This means that if you have an ROC-MC certificate, you can use it to operate your aircraft for commercial purposes, such as offering charter flights or transporting goods. On the other hand, if you have an ROC-M certificate, you can only use it for non-commercial purposes, such as personal flying or recreational activities.