一道逻辑PT42-S2-23

berries

Physics professor: some scientist claim that superheated plasma in which electrical resistance fails is a factor in casuing so-called "ball lightning." If this were so, then such lightning would emit intense light and, since plasma has gaslike properties, would rise in the air. However, the instances of ball lightning that I observed were of low intensity and floated horizontally before vanishing. Thus, superheated plasma with failed electrical resistance is never a factor in causing ball lightning.

The physics professor's conclusion follows logically if which one of the following is assumed?

答案选(E)  All types of ball lightning have the same cause.

做的时候5个答案里我一个也选不出来，因为我觉得professor的logic是正确的啊。(E)很多余啊。。。
谢谢！

berries

哦，汗。。。我明白了，那个professor观测只是一个type的ball lightning