What is the author's attitude toward the corporate physical fitness program

A．Putting fitness programs into effect has been a usual practice for American companies.
B．There is no very convincing evidence to relate fitness programs to increased profits.
C．Being fit is now a requirement for one to apply for a job in an American company.
D．The Fitness program is not so costly as one imagines.

A．employees' physical fitness is a factor of production
B．employees' physical fitness improves industrial performance
C．industry develops along with corporate physical fitness programs
D．there is a market need for corporate physical fitness