What was the impetus for corporations to begin entertainment broadcasting on radio?
a. to get people to listen to commercial advertising
b. to boost the morale during the war years
c. to lift people spirits during the great depression
d. to enable the industry to sell more radio sets
e. to help radio operators on ships stay awake

To help radio operators on ships stay awake was the impetus for corporations to begin entertainment broadcasting on radio.

e. to help radio operators on ships stay awake

Explanation:

The principal radio station ever on the planet's history was made by Reginald Fessenden on Christmas Eve in 1906 when he radiated a "Christmas show" to the bewildered teams of the boats of the United Fruit Company out in the Atlantic Ocean and the Caribbean Sea.

The main voice and music signals heard over radio waves were transmitted in December 1906 from Brant Rock, Massachusetts (only south of Boston), when Canadian experimenter Reginald Fessenden delivered about an hour of talk and music for specialized onlookers and any radio beginners who may be tuning in.

Radio turned into another type of correspondence and amusement. Between the 1920s and 1950s many radio shows were communicated, and assembling around the radio at night was a typical type of diversion.