Michael and Daniel Are in Many of the Same Classes

Multiple Choice

Michael and Daniel are in many of the same classes because they are both engineering majors. Michael is better at math and Daniel is better at science, so they often meet to help each other in their classes. Because both Michael and Daniel are benefitting from their friendship, this would be characterized as a(n) __________ relationship.

A) communal
B) exchange
C) arranged
D) reciprocal