Answer: C is the answer.
Explanation: why its C because it is saying, A word or phrase for one thing that is used to refer to another thing in order to show or suggest that they are similar 2.
The correct answer for this question it this one: "<span>A. However." </span><span>The paragraph uses "compare-contrast" organization. The paragraph itself gives us the differences and similarities of coal and petroleum. Words such as the "on the other hand," "while," and "however" can be used as signals or clues that the paragraph is organized as compare-contrast one.</span>
