Answer :
The correct answer is B. He will favor Nolan because Nolan belongs to the ingroup.
Explanation.
In sociology, ingroups include people with whom you share preferences, opinions, roles, etc. This means in the case presented John would consider Nolan as part of an ingroup because they both like the same basketball time. Additionally, it is common we consider people in an ingroup as similar to us and due to this, we might favor their opinions, behavior, and actions, while rejecting the opinions, behavior, or actions of those belonging to outgroups (outside ingroups). According to this, it is likely John favors Nolan just because Nolan belongs to John's ingroup.