Answer:
E. Market Exchange
Step-by-step explanation:
Based on the information provided within the question it can be said that the theater group is engaging in Market Exchange. This term refers to when an individual or company trades one good or service for another, or for something of utility. Which in this case the theater group is trading free shows, stand up comedy, and even volunteers, all for more memberships. Therefore they are providing their customers a service in exchange for a good which would be money (memberships)