Answer:
Both Athens and Sparta had an Assembly, whose members were elected by the people. Sparta was ruled by two kings, who ruled until they died or were forced out of office. Athens was ruled by archons, who were elected annually.
Explanation:
The correct answer is - C. 1975 - 1999.
The period between 1975 and 1999 was a period in which the world population grew for around 2 billion people. Even thought that is the same rise as in the period between 1930 and 1975, still this period is shorter, and is just 24 years the world population grew from approximately 4 billion people to approximately 6 billion people.
I believe that the answer is a.) It was the segregation of the transportation system in the United States.
