The central economic problem that all humans face is A. shortage
В. scarcity
C. opportunity cost
D. the factors of production
Please select the best answer from the choices provided

What distinguishes monsoon asia from the remainder of asia? what are the consequent differences between the two?

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic

Good scientists always report their observations and results truthfully. this is especially important when a scientist's results go against previous ideas or predictions. coming up with inventive ways to solve problems or produce new things