At the end of his life, laozi (lao tzu) is said to have a. disappeared in a large cave in southern china. b. sailed with friends off the eastern coast of china to find the isles of the blessed. c. died when a tall, heavy bookcase fell over on him. d. left china riding on an ox.

The correct answer is option D

Explanation:

According to Sima Quian (a Chinese historian of the early Han dynasty), Laozi became progressively tired of the moral decay in the city of Zhengzhou (capital of the Henan Province) and the kingdom's decline, therefore he decided to venture west riding a water ox, never to be seen again. The ox in Chinese culture represents the undisciplined nature of the self, the image of Lao Tzu riding the ox means that he became one with his own nature and tamed it.

trade regulation is a field of law, often bracketed with antitrust (as in the phrase “antitrust and trade regulation law”), including government regulation of unfair methods of competition and unfair or deceptive business acts or practices. antitrust law is often considered a subset of trade regulation law. franchise and distribution law, consumer protection law, and advertising law are sometimes considered parts of trade regulation law.

in general the theory of economics says that the more open to trade a country is the better   the result for the same country and the whole economies.

in real life countries impose taxes, quotas, etc which is not so good for the economies.

this kind of commercial war between the usa and china is slowing down the growth of the whole world so we can say that it is a draw back of trade regulations. and the free trade agreements are benefits of trade regulations.

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