Answer:
B) ingroup bias.
Step-by-step explanation:
In psychology, the term ingroup bias refers to the tendency we have to favor the group we belong to or to think our group is better than the group other people belong to (the outgroup).
In this example, Betsy and Tina are assigned to different groups that will compete in a spelling bee. Both Betsy and Tina believe that their own group is composed of the better spellers. We can see that they are favoring the group they belong (or the ingroup). Therefore, their beliefs best illustrate the ingroup bias.