After waiting in line for an hour to buy concert tickets, Teresa is told that the concert is sold out. In her anger she pounds her fist on the ticket counter, frightening the clerk. Teresa's behavior is best explained by:

Her reaction

Explanation:

Her reaction best explains her behavior, she was angry, at the fact that she has been waiting to buy tickets for the concert not until they told her it was sold out.this kind of scenario is very annoying and it is to expect a bad behavior such as the one she did, her reaction explains better her behaviour which was hitting the counter with her fist.

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.