21. A population pyramid that is in the shape of an "upside down triangle" shows that country is probably experiencing

a. Slow population growth
c. Negative population growth
b. Rapid population growth
d. No change in population

All of the following actions are examples of civil disobedience, except a.) refusing to pay an unfair tax b.) refusing to use government services c.) participating in a protest march d.)planning a riot to destroy a government riot