Most economists agree that deregulation in the 1970s and 1980s greatly benefited consumers in all of the following industries except

A) automotive.
B) railroads.
C) airlines.
D) trucking.

Deregulation

Cutting back or doing away with state authority in a certain field, often to foster greater competition in that field.

Automotive

Refers to the design, development, manufacturing, marketing, and selling of motor vehicles.

Railroads

Land transport routes using a series of tracks and stations for the movement of trains to transport passengers and goods.