Answer:
I'm going to need more context but i'll give some more information upon this in general:
---A COMMON GOOD good is something seen as a benefit to the larger community rather than individual interest. YOU DO NOT HAVE TO DO A COMMON GOOD.
--A OBLIGATION is something you HAVE TO DO BY LAW.
- A RESPONSIBILITY is something a person SHOULD DO.
Step-by-step explanation:
Hope this helps.