Answer :
"A It increased racism because African Americans held jobs that returning white soldiers wanted" is the correct answer. There were of course exceptions, but this is generally true.
The correct answer is option A. "It increased racism because African Americans held jobs that returning white soldiers wanted". After World War I finished, demobilization of American troops impacted in racism in the United States because returning white soldiers wanted jobs that African Americans held during war. The employment of newly arrived African Americans while white soldiers were in war resulted in several racial related confrontations.