Which of the following situations provides an example of a "back door" cold front?

Question

Quizplus · Accepted Answer

A "back door" cold front is an eastward-moving cold front that enters a region from the east or northeast, rather than from the west or northwest. This is often seen in the eastern United States and Canada, where the prevailing winds are from the west. Option C is the only answer that involves a cold front moving into a region from the east (Atlantic Ocean into the Maritimes) and thus is an example of a back door cold front.

Which of the Following Situations Provides an Example of a "Back