打在地上的闪电极有可能是具有破坏性的，所以即使它只占了所有闪电的百分之二十，
它仍受到许多科学家的关注。
因此作者在强调即使这种闪电只占了一小部分，但仍受到许多科学家的关注
所以选A
※ 引述《setsuna01gn (colour)》之铭言：
: 大家好! 想请问一下 下面这一题
: Most lightning takes place within a cloud when the charge
: separation within the cloud collapses. However, as the storm
: cloud develops, the ground beneath the cloud becomes positively
: charged and lightning can take place in the form of an electrical
: discharge between the negative charge of the cloud and the
: positively charged ground. 【Lightning that strikes the ground is
: the most likely to be destructive】, so even though it represents
: only 20 percent of all lightning, it has received a lot of
: scientific attention.
: The author mark "Lighting that strikes the ground is the most likely
: to be destructive" in order to explain
: (A) this form of lightning has been investigated so much
: (B) this form of lightning is not as common as lightning within a cloud
: (C) scientists understand of this form of lightning is important
: (D) the buildup of positive charge on the ground beneath a storm cloud can
: have serious consequence
: 爬文之后有看到有人问 但我还是有疑问
: 我的问题是修辞题看的是前句
: 这题答案会是A 是因为 even though... 被挪到后面的关系吗?
: 感谢各位大大!!