The federal government sets requirements that all public schools must follow, while state governments set standards listing what students need to learn. this is an example of what constitutional system?
a. dual federalism b. cooperative federalism c. layered federalism d. unitary federalism i think the answer is a

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.

What has been a long term effect on the panama canal

What are the media and the press sometimes referred to as? a.the fourth estateb.the sixth branchc.the mouthpiece of the governmentd. the first estate