The north korean government prevents individuals from setting up businesses in the country what effect does this have on the economy

The North Korean economy is based largely around self-sustainability. Everything is owned by the government, everything is planned by the government. How much, in which way, in what will be produced and consumed is planned by the government. This results in a very fragile economy above which always lurks the possibility of crack down. The slightest mistakes in the planning, or if some natural disaster occurs, always leads to huge economic problems. It is very common that the people are suffering from malnutrition because the planning didn't turned out as predicted. The economy has growth one year, stagnates another, drops in the next, and it is all very unpredictable.

i would say b. research typically uses a variety of sources

i believe the answer is: returns on investments, no wages

people who belong in upper class society would most likely get there by obtaining multiple source of income, which a certain percentage of ownership for businesses. since most of them are job creator, they would most likely get their money from profit, not wages.