Myrna, Joey's teacher, realizes that Joey needs more time than other children before he will relax and smile in the morning after his Dad brings him into the center. She recognizes which of the following temperamental traits in Joey?
A) Biological rhythms/mood
B) Approach/withdrawal and adaptability
C) Distractibility/sensitivity
D) Activity level/persistence

B) Approach/withdrawal and adaptability

Explanation:

Approach/withdrawal and adaptability refer that how  child  adopt changing environment and behave according to that environment. So Myrna realize that joeys  feel hesitant and take more time to adopt change so he has less adaptability according to changes and new activities.

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.