Answer:
In <em>To Kill a Mockingbird (chapter 23), </em>Scout reveals to her Aunt Alexandra that she wants to invite Walter Cunningham over for a play. Aunt Alexandra seems not to be happy about that plan. When Scout says that the Cunninghams are good folks, Aunt Alexandra agrees. However, she points out that Cunninghams are of different kind than their family, which reveals her prejudices against people of lower social class.
D. a plural pronoun when a singular pronoun was needed.
