Dean has a comprehensive final exam in three weeks that he is concerned about. His concerns prompt him to go ahead and start studying, and in doing so, he feels less worried as the exam approaches. In this example, the exam, Dean’s concerns, and his behavior may be seen as an example of .

eustress

Explanation:

Eustress: In psychology, the term "eustress" is described as "beneficial stress" and it can either be radiological, biochemical, or physical, psychological.

In other words, eustress is determined as an individual's positive feelings or response towards specific stressors and it entirely depends on his or her ongoing feelings of location, control, desirability, and the timing of specific stressors.

In the question above, the exam, Dean’s concerns, and his behavior may be seen as an example of eustress.

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.

this doesn't support enough information to answer the question.