大全-12-20？我想复杂了吗？

20. The wild mouflon sheep of the island of Corsica are direct descendants of sheep that escaped from domestication on the island 8,000 years ago. They therefore provide archaeologists with a picture of what some early domesticated sheep looked like, before the deliberate selective breeding that produced modern domesticated sheep began.

The argument above makes which of the following assumptions?

(A) The domesticated sheep of 8,000 years ago were quite dissimilar from the wild sheep of the time.

(B) There are no other existing breeds of sheep that escaped from domestication at about the same time as the forebears of the mouflon.

(C) Modern domesticated sheep are direct descendants of sheep that were wild 8,000 years ago.

(D) Mouflon sheep are more similar to their forebears of 8,000 years ago than modern domesticated sheep are to theirs.（D）

(E) The climate of Corsica has not changed at all in the last 8,000 years.

逻辑一直是我的痛。。

这题请教一下大家，怎么考虑的？

我一上来就把D给排除了，也没有原因

我选了B：同一时间，没有其他的种类的羊也逃出来。。因为要是其他的羊也逃出来了，那么都不知道杂交到什么样子了，所以从现在的野羊那里是看不到古代的家畜羊的。。我这理解有错吗？

那为什么选D呢？