CD9-32, 句子结构混乱？ 斗胆质疑！！

GWD-12-Q32:

Prospecting for gold during the California gold rush was a relatively easy task, because of erosion, prehistoric glacier movement, and ancient, gold-bearing riverbeds thrust to the surface by volcanic activity put gold literally within reach for anybody with a pan or shovel.

1. because of erosion, prehistoric glacier movement, and ancient, gold-bearing riverbeds thrust to the surface by volcanic activity put gold literally within reach for

2. because of erosion, prehistoric glacier movement, and volcanic activity that thrust ancient, gold-bearing riverbeds to the surface, and putting gold literally within reach of

3. owing to erosion, prehistoric glacier movement, and volcanic activity that had thrust ancient, gold-bearing riverbeds to the surface, and putting gold literally within reach of

4. since erosion, prehistoric glacier movement, and volcanic activity that thrust ancient, gold-bearing riverbeds to the surface, putting gold literally within reach for

5. since erosion, prehistoric glacier movement, and ancient, gold-bearing riverbeds thrust to the surface by volcanic activity put gold literally within reach of

参考答案E，但是不是混乱不堪？表述极不清晰且毫无无并列可言。反观B，似乎好点。

E：thrust、put 都是动词，erosion, movement, riverbeds....能并列么？且后边的thrust 实在看不懂。

E is perfect.

th word "thrust" is ppt.

gold-bearing riverbeds thrust to the surface by volcanic activity 这句话中，中心词不是volcanic activity ，所以谈不上volcanic activity 和erosion, movement并列共同为 put 的主语。

而erosion, movement和 riverbeds并列，显然词性不同，riverbeds为实体名词，erosion, movement为抽象名词（？）

mbz所说的：  E is perfect.  the word "thrust" is ppt.

也是一样，erosion, movement和 riverbeds并列，显然词性不同，riverbeds为实体名词，erosion, movement为抽象名词（？）

另外，B的错误不是很明显的说。。。。

呵呵，我也觉得E奇怪，看不懂，谁帮忙分析一下and后面的句子

再顶起！

B后面好像不是sentence吧？