Between 1950 and 1970, suburbanization: a. encouraged puerto rican immigration. b. eased racial tensions in american cities. c. hardened racial divisions in american life. d. encouraged a revitalization of american cities. e. was the theme of the broadway musical west side story.

c. hardened racial divisions in American life.

Explanation:

Between the year 1950 and 1970 , the way of segregate American life was the suburbs , because , the suburbs became dominant in the cities , and ,

hence , it is also known as white fight , there was the practice of prejudice by the suburbs in the planners and banks .

Hence , the correct answer for the given information is   c. hardened racial divisions in American life .

answer; /// decreasing responsiveness to a stimulus to which one is repeatedly exposed;

answer; interactionist persprctive;