Most radio historians asert that radio broadcasting began in 1920 with the historic broadcast of KDKA. Few people actually heard the voices and music which were produced because of the dearth of radio receivers at that time. Between 1923 and 1930, 60 percent of American families purchased radios.
D. The Kansas-Nebraska Act states that slaves were only allowed in the states below a certain point. And that the number of slave states and free states must remain equal.
