Dr. Chen studies how people grow and change during late adolescence and young adulthood. Dr. Doherty focuses on several traits that distinguish one person from another. Dr. Chen is a(n) psychologist; Dr. Doherty is a .

C. developmental psychologist; personality psychologist

Explanation:

Actually, since Dr. Chen studies how people grow and change during late adolescence and young adulthood, he is a developmental psychologist. Developmental psychology is the study which focuses on the changes and growth that occur in humans during the course of their life. It is usually concerned with development that occur in infants, adolescents, adult development and even aging. One who carries out such study is known as a developmental psychologist. Therefore, Dr. Chen is a developmental psychologist.

Also, since Dr. Doherty focuses on several traits that distinguish one person from another, he is known as a personality psychologist. Personality psychology is the study of the personality of individuals and how they vary among such individuals. One who carries out personality psychology is known as a personality psychologist. Therefore, Dr. Doherty is a personality psychologist.

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.

your answer would b. the missisipi river

hope i you : )