Which of the Following Is a Difference Between White Ethnic

Which of the following is a difference between white ethnic and black migration to the city?

A) Major white immigration into cities occurred after World War I while black immigration occurred after the Civil War.
B) White ethnics were less well-received by established city residents because they arrived after blacks from the south.
C) White ethnics suffered more discrimination because they did not know the language or the customs of their new country.
D) Blacks migrated to Northern cities in large numbers beginning with the First World War while major waves of immigration of white ethnics began in the 19^th century.