Sarah can recite her speech for her speech contest perfectly when she is alone. However, when she is in front of the jury she often loses her "train of thought" because of her concern that they are assessing her performance. In this case, Sarah's performance is influenced by .
A) the self-serving bias
B) evaluation apprehension
C) the risky shift
D) altruism

B) Evaluation apprehension

Explanation:

Evaluation apprehension is the concept in which it is believed that working on a task with other people can raise concern how will those people think of work may improve or degrade performance.

According to the question, Sarah's situation is describing evaluation apprehension as she has concern what jury will think about her speech which impacts in degradation or enhancement of her speech performance.

Other options are incorrect because self-serving bias, risky shift and altruism is not impacting performance of Sarah.Thus, the correct option is option(B).

answer; the intervening variable;

answer; face validity;