评论
打印
答案：B
解析：
Choice B is the best answer. The passage states that the astronomers used the European Southern Observatory's Very Large Telescope to see if galaxies were "hiding in front of the quasars" and checked to see if gas from those galaxies had "soaked up" those quasars' light. In other words, the astronomers were investigating the effect galaxies near quasars had on the quasars' light.
