Which of the following statements best characterizes the effects and treatment of ethnicity during the past 20 years? a. ethnic diversity has increased as new ethnic groups have formed. b. ethnic identification of different groups has declined as populations have become more homogeneous. c. ethnicity has been a source of pride and identification as well as a source of conflict among groups of people. d. people have been less likely to reveal their ethnicity since the advent of the internet, because it has little meaning in online communication.