6.          

From studies of the bony house of the brain, which is the cranium, located in the back of the skull, come what scientists know about dinosaur brains.

(A) From studies of the bony house of the brain, which is the cranium, located in the back of the skull, come what scientists know about dinosaur brains.

(B) The knowledge that scientists know about dinosaur brains comes from studies of the bony house of the brain, located in the back of the skull, that is, the cranium.

(C) The knowledge of dinosaur brains that scientists have come from studies of the bony house of the brain, which is located in the back of the skull and is called the cranium.

(D) What scientists know about dinosaur brains comes from studies of the cranium, the bony house of the brain located in the back of the skull.

(E) Located in the back of the skull is the cranium, the bony house of the brain, and it is from studies of this that scientists know what they know about dinosaur brains.

大案是D

但是B中located in the back of the skull 修饰的歧异在那里呢？

E中解释说it ,this 指代不清，可是我觉得最大的问题还是and it is 没有并列，同意吗？

在句首或句尾，且用逗号隔开的分词结构要尤其小心；因为有即可作定语，也可以做伴随状语的嫌疑。

这里的located....就有这样的嫌疑~ 如2楼所说