Lee is riding an elevator to the top floor of a tall building. During a brief conversation with a stranger in the elevator, Lee mentions that he is afraid of heights, which is not how he normally thinks of himself. After arriving at the top floor, Lee realizes that his fear of heights came to mind because of the elevator ride. This example best illustrates how Lee's thoughts were influenced by
a. his working self-concept
b. a sociometer
c. a self-serving bias
d. his self-esteem