6. how did population shifts change american life during the war?

The Southwest became a growing cultural, social, economic, and political force

Explanation:

After World War II, a number of factors contributed to shaking the industrial supremacy of Manufacturing Belt. A growing volume of industrial investments began to move south and west; the highway construction policy and the development programs in the Tennessee and Columbia river basins have energized new areas; the oil fields of the Gulf of Mexico and California, with increasing production, attracted more investment; and the economic reconstruction of Japan, in turn, aroused commercial interest in the Pacific Basin and thus the west coast.

These transformations originated the so-called Sun Belt which covers the various new emerging areas of the South and the West. The Sun Belt has made the Southwest a growing cultural, social, economic and political force that has generated population changes in the US.

c. legislation should seek to resolve social problems.

letter d is correct.