[填空题]Michael Ross resigned and spent his unemployment time playing guitar and exploring his lifelong interest in scriptwriting and the movie business for he looked at this as an______, rather than a penalty.

Michael Porter, who has made his name throughout the business community by advocating his theories of competitive advantages, is now swimming into even more shark-infested waters, arguing that competition can save even America’s troubled health-care system, the largest in the world. Mr. Porter argues in " Redefining Health Care" that competition, if properly applied, can also fix what ails this sector.
That is a bold claim, given the horrible state of America’s health-care system. Just consider a few of its failings: America pays more per capita for health care than most countries, but it still has some 45m citizens with no health insurance at all. While a few receive outstanding treatment, he shows in heart-wrenching detail that most do not. The system, wastes huge resources on paperwork, ignores preventive care and, above all, has perverse incentives that encourage shifting costs rather than cutting them outrig
A. there is no easy money on the pavement for passers by to pick up
B. Mr. Porter is very likely to fall in a trap set up by the economists
C. competition alone is not enough to cure the health care system
D. only government actions can sweep aside the obstacles along the way