While Watching a Political Debate on Television, Martha, Who Describes

While watching a political debate on television, Martha, who describes herself as very conservative, is watching as the liberal candidate answers a question. When the candidate makes strong points that are backed up by logic, Martha rolls her eyes and doesn't say a word. When the candidate makes one minor error, Martha yells, "See I told you she doesn't know what she's talking about. All of those liberals are idiots!" Martha is demonstrating the

A) need for closure.
B) availability heuristic.
C) self-serving bias.
D) confirmation bias.