What is one reason for people to exchange currency? A
Most people want to use American dollars to trade.
B
Because countries have different currencies that are valued differently.
С
Most people want to use the Brazilian real to trade.
D
They don't because people can use any currency at any business in the world.

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.

hope this !

debating and finalizing the detail of the policy

answer; ///population;