Answer:
The correct answer option is B. a single paragraph.
Step-by-step 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.