Mrs. Dubose speaks cruelly to Scout and Jem and is harsh with Atticus, yet Atticus is kind to her and considers her courageous.

Why does Atticus treat her this way?

AAtticus wants to keep the neighborhood peaceful.
BAtticus does not have to agree with people to respect their dignity.
CAtticus dreads confrontation with people.
DAtticus knows Mrs. Dubose will die soon and he will no longer have to deal with her disrespect.