Put or use the neutral and sought together in a sentence

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.

When and why were fingerprints first used in the united states

The biggest component / ingredient of summer time smog is