the established the federal radio commission and required broadcasters to obtain a license to broadcast on
specific frequencies.
a. federal radio act (1927)
b. federal communications commission act of 1980
c. communications act of 1934
d. telecommunications act of 1996

The established the Federal Radio Commission and required broadcasters to obtain a license to broadcast on  specific frequencies ws set in the:

a. Federal Radio Act (1927)

Explanation:

The Act states its mission, regarding licenses, in the following extract:

"...this Act is intended to regulate all forms of interstate and foreign radio transmissions and communications within the United States, its Territories and possessions; to maintain the control of the United States over all the channels of interstate and foreign radio transmission; and to provide for the use of such channels, but not the ownership thereof, by individuals, firms, or corporations, for limited periods of time, under licenses granted by Federal authority, and no such license shall be construed to create any right, beyond the terms, conditions, and periods of the license."

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