An axenic environment is one a) in which microorganisms remain with the person throughout life. b) that is free of microbes. c) that is a source of contamination. d) in which microorganisms remain present only for a short time. e) contaminated by microbial toxins.

B) that is free of microbes.

Explanation:

An axenic environment -

It is the state of culture , where only a single type of organism , species or strain exist , without any contamination for any other species , is referred to as an axenic environment .

It is a important tool, which is required to study the parasitic organisms in any restricted environment .

Hence, from the question,

The correct option regarding axenic environment is  B) that is free of microbes.

ideology

explanation:

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.