Answer:
both b and d lmk if im right
Explanation:
I guess one vote decrease
The mid-1960's popular music innovation that was ushered in by the beatles was VariSpeed- altering of kHz cycles through voltage changes to slow down and increase tape speed.
<h3>What was VariSpeed?</h3>
The Beatles were a very popular bands for many reasons and one of them was their innovations to the style of Psychedelic rock and Blues that they played. This made their music stand out so much so that they became arguably the influential band to ever exist.
One invention they came up with was called VariSpeed which meant speeding up or slowing down a musical record to produce a desired effect. It was done by using voltage changes to alter of kHz cycles.
Find out more on The Beatles at brainly.com/question/4687506.
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Answer:
Tensions between America and the Soviet Union after WWII + ideological conflict (communism)
The Standard Oil company.
