Question: People favoring those in their group over outsiders, is an example of what?
Answer: Another issue that researchers have attempted to address is the question of why people engage in discrimination, i.e., why they tend to favor those they consider a part of their "in-group" over those considered to be outsiders.
A single-select problem: Is the question answered in a satisfactory fashion?

pick from the following. [I] yes. [II] no.
[I]