Reginald greets his regular customers by name every morning when they come in for coffee. He offers them a taste of anything special he is cooking that day. He has a database with their birthdays, and offers them free meals on their birthdays. Reginald hopes that this attention to his "regulars" will encourage them to

Spread positive word of mouth

Explanation:Spreading Positive Word of Mouth: This is a free advertising but which works effectively for business. It is crucial especially for those who won small businesses , who can't go big on making advertisement, they save a lot through relying on this method.

What is a word of mouth?

Word of mouth (WOM) refers to how one person tell others about how good a certain product is or service is.

People usually trust a word of mouth more than they would trust a formal advertisement because they know the person who has bought the product will speak from the actual experience and that person has not been paid to do that.

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.

now you can mark brain hope this