Action research is:

A) the theoretical foundation for appreciative inquiry.
B) a form of teambuilding.
C) a highly participative process of planned change.
D) a social structure created alongside the formal organization for the purpose of refreezing the desired conditions.
E) None of the above.

Action research is a process of planned change that involves active participation from those involved in the change effort. It is a collaborative and iterative approach that focuses on problem-solving and improvement. It typically involves several phases, including identifying a problem, collecting data, analyzing the data, and implementing solutions. It is not the theoretical foundation for appreciative inquiry, a form of teambuilding, or a social structure created alongside the formal organization for the purpose of refreezing the desired conditions.