Final answer:
The situation the student describes is an example of in-group bias, which is not one of the listed options. However, confirmation bias and in-group bias from the provided information seem most relevant to the behavior described.
Step-by-step explanation:
The scenario described by the student is an example of in-group bias, a preference for our own group which can lead to prejudice and discrimination against out-group members. The correct answer to the question is not listed among the provided options. However, the concept closely relates to both the confirmation bias and in-group bias mentioned in the background information. When a member of an in-group commits a negative act, the tendency to give them the benefit of the doubt, whereas an out-group member is less likely to receive such leniency, arises from a combination of these biases.
In-group bias makes us favor our own group, while confirmation bias leads us to seek out information that supports our pre-existing beliefs and stereotypes. This can result in a double standard in how we perceive and judge the actions of those from our own group versus those from an out-group.