这个练习任务一共有四个段落，请你顺序阅读第一题到第...

这个练习任务一共有四个段落，请你顺序阅读第一题到第四题，并且为每一个段落（对应一题）找到最恰当到subheading，并在做判断到时候体会前面视频中降到到subheading的重要性和写作技巧。 第一段：On a starlit night, beetles were released with their dung balls from the center of a circular arena of flattened and leveled sand, enclosed within a 1 m high, featureless circular wall. To determine how accurately dung beetles can orientate along straight paths when prevented from seeing any celestial cues, we obscured the dorsal visual fields of Scarabaeus satyrus with small cardboard caps (Figure 1C), whereas the ventral eyes were not impeded. … To test for a possible effect of the cap, we also fitted beetles with a transparent plastic cap of the same shape as the cardboard version. … Thus, the straight-line orientation of S. satyrus is significantly impaired if they are prevented from seeing the starlit sky.

A、Scarabaeus satyrus fails to orient without celestial clues

B、Scarabaeus satyrus uses stars of night sky for orientation

C、Scarabaeus satyrus uses milky way for orientation

D、Future experiments