Yes, you do have to file a tax return
I believe the correct answer would be option A. The government regulate natural monopolies by ensuring and overseeing one supplier. A natural monopoly would happen when a largest manufacturer of a certain industry would have a very big gap as compared to other competitors. These industries are being regulated so as to minimize monopolization and to maintain the competitive equality between industries. Monopolies are mainly being governed by antitrust laws on a national level and on an international level. The ways that the government is regulating are establishing average cost pricing, price ceiling, Rate of return regulations and taxation laws.
B and C, are bad feautures. A makes more sense, than D, so A should be your answer.
