Which of the following is one of the reasons that the native american population decreased significantly in north and south america after the arrival of the europeans? a. native american tribes fought against each other in wars. b. the europeans brought diseases like smallpox, and many native americans died. c. many native americans moved to europe. d. there was widespread famine, and many native americans starved.

B. The Europeans brought diseases like smallpox, and many Native Americans died.

every society, in order to meet the needs of it's people, has to answer three basic questions:

- what should we produce?

- how should we produce it?

- for whom should we produce it?

this questions must be answered in order to, option b, aid in production decisions.

every country can't produce everything, no matter how rich their land is. it may be a matter of technology, resources or geographical conditions. so, these three questions must be resolved in order to get the most of the production of each land.

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the money supply is the total amount of money available in the economy. how do changes in the money supply affect people and businesses?