Which of the following events separate geologic time into eras and periods?

a. the number of earthquakes that occur at that time

b. the appearance and disappearance of groups of organisms

c. the appearance and disappearance of volcanoes

d. the creation of new ocean ridges

answer: an oligarchy is a political system in which the government is run by a group of noble families, or the elite wealthy members of a society. a present day oligarchic government is iran.

explanation:

she believed that scott was her late husband's property.

men and women were able to be citizens, but women did not have all of the rights of men including voting and holding office. slaves could be if they were freed.

the answer is false.