Which best describes the red summer of 1919? ?

I think the red summer was when Communist was happening in Russia. The people in the U.S thought they were going to turn into communist. So people was very scared and opposed russians and communist supporters* "I think"

Explanation:

There were race riots all over America between May and October in about thirty cities, the bloodiest were in Elaine(Arkansas), Washington D.C and Chicago.

Explanation:

Labor Shortages: Industrial cities in the North and Midwest profited greatly from World War I. Yet, the factories also encountered serious labor shortages because white men were enlisting in World War I and the United States government halted immigration from Europe.

The Great Migration: To fulfill these job shortages, at least 500,000 African-Americans moved from the South to Northern and Midwestern cities. African-Americans were also leaving the South to escape Jim Crow laws, segregated schools, and lack of job opportunities.

Racial Strife: Working class white workers in Northern and Midwestern cities resented the presence of African-Americans, who were now competition for employment.

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation:

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.