A 50-N force is applied to a 10-kg chair, but the chair does not change its motion. What could explain this? A. The chair's mass is too great for the force to have an effect.
B. The distance the chair moved is very small.
C. The forces are unbalanced
D. The force is balanced by an equal force in the opposite direction.

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.

уєѕ нє ℓσѕт ¢σитяσℓ σf нιѕ ρυριℓѕ

a factory opens that mass-produces light bulbs.

explanation:

not sure if that's an answer to your questions but this is an example! : )

which sentences ? that question is incomplete