Which of the following is the least common type of regime change?

Strong, community-oriented neighborhoods have weakened in recent decades, and some areas have disappeared altogether

Indicate whether the statement is true or false.

A sociologist at George Washington University pointed out that one incident on its own might NOT move American public opinion, but a(n) ______ of these incidents might certainly shift public opinion.

a. critical mass b. small number c. isolated few d. rising number