旧prep1-67中关于extent和degree

yqyhx

Scientists say that each of the photographs taken of the Ares Vallis plain by the Mars Pathfinder indicate the overwhelming extent to flooding on the planet billions of years ago and the degree that rocks were scattered by its force.


(A) indicate the overwhelming extent to flooding on the planet billions of years ago and the degree that


(B) indicate that the extent of the floods on the planet billions of years ago was overwhelming and the degree to which


(C) indicate the overwhelming extent of the floods on the planet billions of years ago and the degree to which


(D) indicates the overwhelming extent of the flooding on the planet billions of years ago and the degree to which


(E) indicates the overwhelming extent to flooding on the planet billions of years ago and the degree that


我选的是E，答案是D。我能理解D是对的，可是为什么E错了呢？
破解版里的解释是习惯用语:the extent of sth或者to …extent, 表示…的范围和the degree to sth或者to…degree,表示…的程度
可是我查各种词典都没有说degree后面能加to的啊，如果说这个to是可以理解为to the degree，那么为什么extent就不可以呢？是因为它后面加的是名词而不是定语从句的原因吗？
疑惑中。。。。敬请赐教~~

yqyhx

怎么没有人来解答呢？NN们啊快来啊~~~