C. They made it easier to perform calculations.
Answer:
The answer is B, it is the first time black and white actors appeared on stage together on Broadway
Explanation:
As at that time, Show Boat was able to address the social menace of its time which was social evolution and black racism. With the idea of a cast that incorporated both the blacks and the white, it was the first musical on Broadway to feature both white and black performers.
Practicing those ideas meant a loss in the monarchs' power, which is something they would not like to happen
I believe the answer is: Cognitive dissonance
In psychology, cognitive dissonance refers to a situation when an individual is having inconsistent thought, behaviors, or principles.
Cognitive dissonance is much more common among people in teenage-young adults when their moral compass is still not fully developed yet.