Kaitlin Describes Herself as Unmotivated

Kaitlin describes herself as unmotivated. She has not felt rewarded by her attempts to succeed at school or work and, therefore, has given up trying. How might a psychologist who adopts a strict behaviorist approach account for Kaitlin's behavior?

A) Kaitlin believes that she cannot succeed and, therefore, avoids putting herself in situations where she might fail.
B) Kaitlin has a history of not being reinforced for trying to succeed and, therefore, has stopped trying.
C) Kaitlin focuses too much on negatives and does not have a positive outlook on life.
D) Kaitlin has low levels of the trait known as extraversion.