Answer:
Advances in assembly line mass production
Large-scale production reduces costs of automobiles
Growth in personal automobile ownership
Commuters face traffic congestion
Explanation:
The Republican Isolationists refused to ratify President Wilson's League of Nations plan because D) they were opposed to Article 10 that could infringe upon the United States' right to declare war and expand its territories.
In 884, Charles the Fat reunited all the Carolingian kingdoms for the last time, but he died in 888 and the empire immediately split up.
