In 1920, america’s first radio
a) closed because few americans bought radios.
b) was an immediate success.
c) broadcast al jolson in the jazz singer.
d) put early movie houses out of business.

Following archduke franz ferdinand's assassination, austro-hungarian leaders: a. aided the ottoman empire in its campaign to keep serbia under its control. b. executed nearly all prominent serbs living in austria-hungary c. threatened to invade serbia if serb leaders did not agree to a set of strict demands. d.. formed an alliance with great britain to protect austria-hungary from future attacks.