Although Atticus is presented as a man of unimpeachable integrity, he still has one particular flaw, which is best described as

a)his willingness to be passive in his own children's upbringing, allowing them to do pretty much whatever they like

b) his belief in the essential goodness of all the people in his home community, that they are always going to do the right thing

c) his condescending treatment of the folks who are lower in status than he is, like the Cunninghams and Calpurnia

d) his assumption that he doesn't need to ensure that there's no need to worry about situations that can get out of control