the "car culture" of the 1950's was C. a way of life that centered around the automobile
The causes of mudslides normally refer to large amounts of water cause dirt on a slope to fall, and while they're <em>involved</em> with erosions, the difference is mudslides typically refer strictly to water, meanwhile erosions refer to wind, water, or other natural agents.
Hope this helps. I apologize if it doesn't.
Answer:
limit the number of immigrants allowed entry into the United States through a national origins quota.