The Golden Age. Generally speaking, historians and technicians refer to the time between post WWI and the Great Depression as the "Golden Age" of piano building, because by and large, many people had come to the conclusion that the design and general conception of the instrument was 'complete', and that there was very little room for further improvements.
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secondary source
In scholarship, a secondary source is a document or recording that relates or discusses information originally presented elsewhere.
The correct answer to this open question is the following.
Although there are no options attached or further reference and context, we can say the following.
The event in Georgia that showed both growing racism and a deep suspicion of northerners moving to the South was the Atlanta Race Riot of 1906.
The Atlanta Race Riot started on September 22, 1906, and ended two days later. Infuriated white people violently attacked and wounded many African Americans in Atlanta, Georgia. They also damaged black's private property.
The justification: it was said that some blacks had assaulted a white woman and this was reported on the news. But historians agreed that this incident was just the trigger because white people felt threatened by the increasing number of African Americans in the workplace and the factories.
