Answer:
b. Argued that leisure and consumption had replaced political involvement.
Explanation:
Known as the Middletown studies, the 1929 study by Robert Staughton Lynd and Helen Merrell Lynd, husband-and-wife sociologists, were sociological case studies of the white residents of City of Muncie in Indiana. Their findings were detailed in Middletown: A Study in Modern American Culture, published in 1929, and Middletown in Transition: A Study in Cultural Conflicts, published in 1937. The research was made for the purpose of discovering key cultural norms and better understanding social change in America.