Sarah was browsing an online shopping site when a program got downloaded onto her system without her knowledge. the next day she found that her search engine had been changed, and she received pop-up advertisements of the shopping site she had visited the previous day. the program on sarah's system is ) a cookieb) adwarec) a payloadd) a trojan horse

B) Adware

Explanation:

Adware is defined as the malicious software that induces virus in computer system so that it can display undesired online advertisements.These can appear on the system in the form of unclosable ad window or with pop-up configurations.They can also derive the user to the advertising website.

According to the situation mentioned in question,Sarah's system has adware program that got downloaded for displaying unwanted advertisements of the shopping site.

Other option are incorrect because Trojan horse virus can take the control over the complete system.Cookie is type of small file present in system.Payload is considered as the actual message part that needs to be  transmitted .

Thus, the correct option is option(B).

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.

its c i google it wish u luck