阅读下列短文, 从给的四个选项 （a、b、c和d） 中, 选出最佳选项。
"can i get a light?" this question is among the most common between smokers. what if this question was to come from an unusual source? in april 2014, the national health promotion foundation uploaded an anti-smoking advertisement onto youtube. the anti-smoking ad has quickly been known as the "most powerful anti-smoking ad."
the anti-smoking video, c
