Which statement is the most accurate? 

a) Virtually no chief executive officers of large corporations have gone to prison in recent years.

b) About one-quarter of the chief executive officers of the 500 largest American corporations have either gone to prison, paid large fines, or both.

c) Although some chief executive officers of large corporations have received prison sentences, none has been longer than three years.

d) Martha Stewart was the only person to do actual time in prison for corporate crime.

e) In recent years some corporate executives have received prison sentences of over five years.