The Lynds Suggested That the Gap in Middletown Between the Business

The Lynds suggested that the gap in Middletown between the business class and working class was a consequence of moving from a small market town to a town in which machine production was ascendant. Which of the following is one of the causes to which the Lynds attributed this change?

A) an increased emphasis on money
B) a decline in religious values
C) increased immigration
D) organized labor activity