While watching a political debate on television, Martha, who describes herself as very conservative, ...

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. c. self-serving bias. self-serving bias.
  d. confirmation bias.