Which of the Following Statements Is True

Which of the following statements is true?

A) Thanks to the popularity of deregulation in the 1960s,by the end of the decade the airlines were free to set their own prices and select their own routes.
B) Before deregulation,the Interstate Commerce Commission sometimes forced truckers to take roundabout routes and to return with empty trucks from long hauls.
C) Airfares have stayed about the same after deregulation as they were before deregulation took place.
D) Deregulation in various industries that took place in the 1980s has been an unqualified success,except in the airlines industry.