In a economy individuals answer the three basic questions and the central authority or leaders have little say in the economy?

a. market
b. mixed
c. traditional
d. command

What id the primary human cause of the global warming a. storage of nuclear fuel rods b. burning of fossil fuels c. building of high-density housing d. violent conflicts over natural resources

High human population have had a negative effect on what issue? a. demand for consumer goods b. ability to staff armies c. business profits d. biodiversity

Approximately how close is russia to alaska ? a.5 miles b.50 miles c.500 miles d.5000 miles