John Gets into Fights on a Regular Basis, Always with Formidable

Multiple Choice

John gets into fights on a regular basis, always with formidable opponents. He has often been injured in these fights and knows that he runs the risk of sustaining serious brain damage or other permanent injuries, yet he continues to fight. John is a very successful professional boxer. This example illustrates that bizarre behavior _________.

A) can be a good way of making a living
B) is incomprehensible
C) is less puzzling when the reinforcers maintaining it are known
D) is sometimes a good solution to the problems people face