Eric has joined a new fraternity. if the other fraternity members now consider eric as part of their ingroup, they are more likely to: pay less attention to his actions and ideas remember things that he does with greater accuracy view him in somewhat negative terms view him in a generally positive light

The answer is "View him in a generally positive light".

Explanation:

An in-group is understood as a group to which a person belongs. The members of the group generally share interests, as well as attributes such as race, age and gender.

Members of an in-group usually see other members with affinity and respect, and It's possible that they develop a sense of favoritism towards each other.

the answer is b, encourage free trade