Question

What was one of the defining revenue models used in early radio broadcasting?

a) companies charging content providers a fee for the use of radio stations, based on how much
airtime was used
b) companies working with hardware producers to take a fraction of profit earned off of radio sets in
order to make a profit
e) companies receiving contracts with the US government in order to produce educational
programming on the radio.
d) None of the above

Answer 1

no entiendo esa tradición, sorry