The correct answer is letter A.
Explanation: Plessy V.Ferguson was a landmark case decided by the United States Supreme Court that ruled on the constitutionality of the right of Union states to impose racial segregation in public places under the "separate but equal" doctrine.
Republican Isolationists refused to ratify President Wilson's League of Nations after World War I because they feared it would draw the United States into future European conflicts. At the end of World War I, the US was only just begin to depart from its previous policy of foreign affairs, which was isolationism - staying out of other countries' affairs. The Isolationists feared that tethering the United States to the League of Nations would result in the US being required to come to the aid of an invaded European state at a later date.
Fascism is the answer to your question
POLITICAL REASONS: ENCOURAGEMENT FROM RULERS British monarchs encouraged the development of colonies as new sources of wealth and power. They granted charters to groups of businessmen, like the Virginia Company, who offered to help colonists settle in the “New World.” Economic - Concerns money and wealth
B:American contributions to the columbian exchange
