C. Discrimination
Correct.
C Is correct because discrimination was defined in lecture as an actual
behavior towards an individual or group based on their group membership.
Also see Myers page 337. In this example, Joanne is discriminating
in favor of Steve because he is a member of a particular group (softball
players). Note that while discrimination is usually thought of as
a negative behavior against a person, it can also be a positive behavior
to help another person based on their group membership.