Answer:
In this situation these students are exhibiting the self serving bias.
Explanation:
Two friends attribute their high math scores to their high level of effort and ability in math and their low Spanish grades to their teacher's subjective grading and favoritism.
In this situation these students are exhibiting the self serving bias.
The self serving bias is defined as a person's tendency to attribute positive events to their own character and hard work and they attribute negative events to external factors or any other excuse.