Social Ferment, a Growing and Increasingly Well-Educated and Affluent Middle

Social ferment, a growing and increasingly well-educated and affluent middle class, and technological innovations have contributed to ______.

A) a decrease in interest groups because it is easier for people to work on their own
B) the rapid proliferation of interest groups since the 1960s
C) the replacement of large interest groups with smaller and more focused groups
D) replacing traditional lobbying activities with more grassroots activism