the correct answer option is b. a single paragraph.
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.
answer; read and consider the content of the items;
answer///supply is elastic, and demand is inelastic;