What was the underground railroad an eample of?

How are the republican and democratic presidential candidates chosen? a. they are nominated by their state governments. b. each is nominated by his or her respective party. c. each is chosen by the governor of his or her home state. d. they are chosen by the house of representatives.

What was one major cause of worldwide conflict during the first decade of the 21st century?

Why did alexander go primarily east and south from macedonia and greece in his conquest