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67.   (28133-!-item-!-188;#058&003500)

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

答案是D，偶想请教各位E 错在哪里，谢谢！

以下是引用jay8418在2007-10-22 11:44:00的发言：

67.   (28133-!-item-!-188;#058&003500)

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

答案是D，偶想请教各位E 错在哪里，谢谢！

请问一下：

1。extent to 和extent of 有什么区别呢？

2。the degree to which (这里的which是指代the flooding还是which rockets..后面句子的疑问代词？谢谢