At first we had nothing, then hunting. This eventually evolved into farming because it is easier.
Because the people who where farming where making the food, they controlled the population. This means that they started to give out specialized jobs to people to meet their needs. This cycle led to kings and queens then business.
Taking an educated guess here -- I think it would be 1, 3, and 4 which all seem pretty reasonable.
The trade happens through the trade blocs that were put in place.
Explanation:
Communist regimes that are not economically liberalized still trade with the world through their trading blocs.
These are governmental institutions designed so as to allow for trade to happen in the country and through the country.
These trade blocs deal directly with the companies of free trade nations where the government in itself trades very rarely as is the case with the US.
Thus the dealing is usually with the government directly.
