大全补充250-186，没有讨论过。但答案是否有误呢？

186. The utility company has announced that it will permanently close its Unit I nuclear power plant, the first plant that had been built by private industry and the model for a generation of modern nuclear reactors.

(A) that had been built by private industry and

(B) built by private industry and which was

(C) to be built by private industry and which was

(D) built by private industry and

(E) to have been built by private industry and was

答案D

如果将D拿出来，就是：

the first plant built by private industry and the model for a generation of modern nuclear reactors.

此处将private industry 和 the model for a generation of modern nuclear reactors.并列，作为built的动作发出者，逻辑意思是否荒唐呢？

所以，我选择A（and后省略了had been）

谢谢斑竹!

有点明白了。