Answer:
C.
Explanation:
The question states that a LINE is reflected, just with this information we know that A. is incorrect because it is curved.
At first, when looking at B., it seems as though it could work, until you notice that it starts somewhere, but doesn't end, thus it is not a LINE. So, we can count B as incorrect as well.
When looking at C, it it a straight line, and has a beginning and and end, which means that so far, it is the most likely the line.
Then, we look at D. When looking at D, we can tell that it is a straight line, however, it has no beginning and no end, thus it can't be the answer.
Now, we know that C is the only possible answer for this question.