Rock and Roll came out about the time of the Television gaining popularity in the U.S. Television was absorbing the dramas that had previously been on radio. As such, radio was expanding into the music market. One of the pioneer radio hosts was "Moondog" Alan Freed in Cleveland, Ohio is credited with naming this new style of music which was in part derived from R&B music.
European economy and landscape was in shambles as countries struggled to repair from the damage done to it through advancements in technology and war strategy.
Answer:
D South Carolina's Commons House of Assembly passed the Intolerable Acts in an attempt to protect colonists from British policies.
The Soviets detonated their first atomic bomb in 1949.