Final answer:
According to the theory of stereotype threat, Ami's thinking is most likely to cause her to underperform.
Step-by-step explanation:
According to the theory of stereotype threat, if Ami thinks that her performance may be negatively compared to the performances of people in another group, her thinking is most likely to cause her to underperform (option C). Stereotype threat refers to the fear of confirming negative stereotypes about one's group, which can lead to anxiety, self-doubt, and reduced performance. For example, if Ami believes that her group is stereotypically seen as less intelligent, she may feel pressured and anxious, leading to underperformance compared to her potential.