Karena reasons, "the wisest decision is to report the activity even though I may lose my job. I have to have courage to do what is right and just." Which ethical theory best depicts her reasoning?

Virtue ethics

Explanation: Virtue ethics explains the role of character or behavior and the exhibition of high moral standard in an individual's dispensation. Virtue ethics preaches the worth and need to for moral uprightness irrespective of duty, obligation or situation. It explains the role of character and Virtue in moral philosophy rather than being bound by principle of obligation, duty or consequence of an action.

In the scenario above, Karena showed Virtue ethics of courage, justice and wisdom in the face of negative consequence of losing her job. She still chose to do what is right.

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.