In north korea, a farmer’s income is the same as a dentist’s income. in a country with a mixed or market economy, the difference between those two professions might be more than 5 times different. how can you explain the fact that individuals doing the same work in different countries do not earn comparable salaries?

Due to capitalism and free market, (in some countries) the professions differ due to certain requirements. For example, a dentist works hard for dental and went through years and years of school, however as a farmer you just earn lower than a normal dentist. It's a classic example of communism as how North Korea goes by.

It wouldn't really work in a long shot, the motivation to earn the same as a farmer is just no.

the answer is "b.the increased supply will create a surplus. "

the essential thought behind price controls is straightforward - utilize the power of law to modify the equilibrium of a market. for instance, the legislature may choose that the steel business needs to survive, and in this way pass a law to set a value floor on steel. this implies all steel sold must offer at or over the floor value, which must be set over the equilibrium cost for it to have any impact. the switch could likewise happen - the administration can choose that steel is excessively costly and set a value roof underneath its equilibrium value, with the goal that all steel must be sold at or beneath that ceiling.