Answer:
Roger is slipping into C. despair.
Explanation:
Despair refers to the absolute loss of hope, a complete and deep feeling of sadness, of sorrow.
In this case, Roger feels he was never able to reach his potential and opportunities and that he hurt a lot of people. We know he is feeling despair because he knows and thinks it is too late to make amends. We can see he has lost all hope of making things right.