Because She Beat Her Goal This Year by Nearly 30

Because she beat her goal this year by nearly 30 percent, Helena has been telling everyone in the sales department of her incredible skill as a salesperson. But last year when she didn't even reach her goal, she said her failure was due to the poor economy. Helena provides an example of

A) the halo effect.
B) a self-fulfilling prophecy.
C) fundamental attribution bias.
D) selective perception error.
E) self-serving bias.