【阅读理解】阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。
Skeptics are a strange lot.Some of them refuse to admit the serious threat of human activities to the enviroment, and they are tired of people who disagree with them.Those people，say skeptics，spread nothing but bad news about the environment.The “ecoguilt”brought on by the discouraging news about our planet gives rise to the popularity of skeptics as people search for more comforting worldviews.
