Answer:
A. High entry costs prevent new producers from entering the market.
Explanation:
Oligopoly is the opposite of monopoly (only one company that offers a service or is the supply). An oligopoly has few companies offering one service or product which can control the supply and market price of it, such as automotive sector or airline. One of the things that limited competition in an oligopoly is the costs of entry, to set up the manufacturer, to make research and marketing and be able to compete with these companies the entry cost is high.
The correct answer to this open question is the following.
The impact of the commercial revolution (16th century ) in Western Europe was the following.
The commercial revolution's impact was that it generated a big competence between European countries in trade. The rules of trade and commerce dramatically changed due to the Columbian exchange and all the goods, raw materials, and natural resources were affected due to this competence between European nations, supply, and demand.
The commercial revolution also saw the beginning of financial institutions and the surge of banking institutions that coined money and made loans.
The subdivision of houses for low income families.
Arouung 1950s .... :)
im not sure tho