Critics object that have tried to define away the genuine problems underlying metaphysical speculation.

logical positivists

Explanation:

Logical positivism is also known as logical empiricism. It is a philosophical movement which arose in federal capital, Vienna in 1920s and it was characterized by view which says that the scientific knowledge is the foremost and only kind of the factual knowledge and all the traditional metaphysical speculation or doctrines are have to be rejected as meaningless.

The critics that are logical positivists claim that there are some genuine problems which rely on metaphysical speculation or doctrines and must be disregarded.

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 am pretty sure it is d.