Choose the answer which best rewords the italicized portion. If you think the original wording is best, choose option A.
Therefore the etiquette rules differs depending on where a person lives.

Question

Quizplus · Accepted Answer

The best choice is "Therefore, the etiquette rules differ"
To make the sentence easier to read or to signal a pause, a comma is used to set off the introductory adverb "therefore." In the original sentence, the subject and verb do not agree. "Differ" agrees with the plural subject "rules."

Choose the Answer Which Best Rewords the Italicized Portion