Question 4 of 10 Which situation best describes an opportunity cost? O A. An employer who hires a new employee can't hire the other people she interviewed. O B. A marketing company goes out of business because it could not find enough clients. C. A person decides to go back to college in order to transition to a new career. D. A corporation that begins selling a new product sees its overall profits increase.​

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Explanation:

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link :

the correct answer option is b. a single paragraph.

explanation:

when you are thinking about paragraph​ topics, you should always choose a subject that can be adequately addressed in a single paragraph.

a paragraph is a piece of writing consisting of a few sentences that deal with a single theme. it has only a single idea that the paragraph revolves around and talks about.

so a paragraph topic must be chosen wisely where a single idea can be communicated in a single paragraph.