Question

A comma should not be used to __________.

A. separate compound elements
B. set apart an introductory phrase
C. separate narration from quotations
D. set apart introductory words or interjections

Answer 1

I think that the answer would be A

Answer 2

A comma should not be used to separate compound elements. Compound elements should always be together, they cannot be separated by a comma. In the other cases, comma should be used.

Answer: A. separate compound elements