What similar impact did both the automobile and air travel industries have during the last half of the twentieth century?
A. Both the automobile and airline industries led to the movement of people from the city to suburbs.
B. Both the automobile and airline industries were the subject of several rock 'n' roll songs.
C. Both the automobile and airline industries generated jobs directly and indirectly worldwide.
D. Both the automobile and airline industries led to major highway systems through the world.