How does meeting the old man in prison most affect Nnamabia?

It causes Nnamabia to realize how lucky he is that he has money and the support of his family.

It makes Nnamabia ashamed of his actions that rightly landed him in prison while the man is clearly innocent.

It angers Nnamabia to know that he and the old man have been wrongly imprisoned.

It makes Nnamabia understand the extent of injustice present in the prison system.

from "Cell one"