100 POINTS PLEASE HELP ASAP I WILL GIVE BRAINLIEST In what type of economic system is the price at which goods are sold determined by a central planning committee?

command economy
democracies
traditional economy
market economy

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.