A recent sales report indicated that Helena exceeded her annual sales goal by $30$ percent. Since the report posted, Helena has been claiming her success is due to her incredible skill as a salesperson. However, when Helena fell $15$ percent short of her annual goal, she said her failure was due to the poor economy. Which type of bias does Helena exemplify?

Multiple Choice

fundamental attribution bias

the halo effect

self$-$serving bias

a self$-$fulfilling prophecy