Which countries in the world today operate under oligarchy

How does specialization enable countries to trade with one another? a country can make and sell goods affordably and buy goods that it is inefficient at making. a country can make what it chooses and sell its goods to other countries. a country can decide to buy everything it needs from other countries. a country can efficiently make goods that were once difficult to make.

Whether or not a given study has the possibility of causing harm to participants:

After having your fifteenth candy bar we can assess that you would have? a. negative utility b. high utility c. low utility d. a sixteenth candy bar