Explain mass support :

What role did the alliance system play in preventing austria-hungary and serbia from coming to a compromise settlement?

How did the invention of the cotton gin affect slave labor in the united states? a. there was a forced migration of slaves from the south to the north. b. slave-owning cotton planters were gradually forced to sell their plantations. c. more slaves were purchased to work on cotton plantations in the south. d. the reduced need for labor on cotton plantations led to a decline in slavery. e. slaves were moved from cotton plantations to sugar plantations.

During the cold war, the united states was involved in certain regional conflicts due to fears later called the domino theory, which stated which concept?