A psychology professor decides to play a practical joke on a colleague in the history department. While the historian is giving a lecture on the first day of class, the psychology professor interrupts and asks to speak with her outside the classroom. While they are conversing, all of the students leave through a back door and are replaced with a completely new group of students. Upon returning, the history professor continues her lecture without noticing that the students are different, thus illustrating:

change blindness

Explanation:

Change blindness occurs when there's a change in a visual stimulus and the observer isn't aware of the change.

Since the professor wasn't aware that the sets of students in the class gas been replaced by another set of students and continued teaching like nothing happened, then this is a change blindness.

i think the answer is true

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.