In which of the following sentences are commas used correctly? a. items sold in bulk include flour, butter, sugar and bananas. b. items sold in bulk include flour butter, sugar, and bananas. c. items sold in bulk include flour, butter, sugar, and bananas.

A

Explanation:

Flour, Butter those are different things so they need a comma between them. between sugar and banana there been used a conjunction and so first one is correct

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.

is that the whole question?