Suppose there is an excess demand for cell phones. in a market without price controls, market pressures will cause the price of cell phones to until it reaches the equilibrium price.

In a market without price controls, the actual price, the equilibrium price, is generated from the relation between bidders and claimants. The demand is the global price that shows the purchasing intentions of consumers. When there is a excess of it, the producers rise the prices so they can afford they production level until they reach the new equilibrium price. So the right answer is RISE.

the aksumite empire was an ancient kingdom located in what is now northern ethiopia from the period of 100 ad to 940 ad. its capital was the city of aksum. the kingdom established itself as one of the 4 great powers at its time, along with persia, rome, and china.

the kingdom was rich in goods like gold, iron, and salt. it established strong commercial ties with the regions governed by rome, egypt, and persia (arabia). aksum was a key location in this commercial network. trade was also facilitated with the introduction of the aksumite currency.

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 !