What is bimetallism? A. switching back and forth between gold and silver according to economic circumstances
B. a nation's use of two different metals to back up its currency
C. the silver standard
D. the gold standard

In 1819, what did the united states obtain from spain for $5 million?

How do private property rights serve as an incentive in a free enterprise economy ?

What do most climatologists see as a major cause of rising global temperatures? a. earth's closer proximity to the sun due to its gravitational pull b. greenhouse gases produced by burning fossil fuels c. rising ocean levels caused by melting polar ice sheets d. water pollution cause by industrial waste