Zach is a franchisee with Digger's Doggies, a chain of hotdog shops. He was doing well until several other Digger's Doggies franchisees got in trouble and were forced to close their shops. Soon afterward, Zach's business declined and was also forced to close. This is an example of(A) management by exception.(B) an economic shakeout at work.(C) the coattail effect.(D) the law of diminishing returns.