Your friend Gandalf asks if you can give him a ride home for winter break. You agree to the request in part because you know that you will need his help studying for your physics exam. Your agreeing to drive Gandalf home is best explained by
A) reciprocal helping.
B) altruism.
C) social facilitation.
D) obedience.

A) reciprocal helping.

Explanation:

Reciprocal helping is the act of responding to a favor in hope that one would benefit from it in the future. It is the act of doing something for others hoping that they would do the same in return.Reciprocal helping is common trait that all individuals and organizations exhibits.Doing a favor to Gandalf since I would be needing his help studying for physics exam is an act of reciprocal helping. It will help me to benefit myself positively when I do him a favor.