OG258请教，谢谢了

258. The British sociologist and activist Barbara Wootton once noted as a humorous example of income maldistribution that the elephant that gave rides to children at the Whipsnade Zoo was earning annually exactly what she then earned as director of adult education for London.

(A) that the elephant that gave rides to children at the Whipsnade Zoo was earning

(B) that the elephant, giving rides to children at the Whipsnade Zoo, had been earning

(C) that there was an elephant giving rides to children at the Whipsnade Zoo, and it earned

(D) the elephant that gave rides to children at the Whipsnade Zoo and was earning（A）

(E) the elephant giving rides to children at the Whipsnade Zoo and that it earned

Choice A, the best answer, uses the idiomatic construction noted... that and clearly focuses on the salient information—a comparison of annual earnings. In B, the structure of noted... that the elephant, giving rides..., had been earning falsely implies that the reader already knows about the elephant—that is, that the existence of this particular elephant is not new information. Also, the past perfect had been improperly places the elephant’s earning in the past, prior to Wootton’s; consistent verb tense is needed to show that the actions are simultaneous. Choice C may be faulted for distortion of meaning and diminished clarity because it suggests that the point of Wootton’s example was the elephant’s very existence; comparative earnings are presented (after and) as incidental detail. Choice D is awkward and inexact; the whole circumstance that Wootton “noted” is best expressed in a clause that begins with that. Choice E does not use the idiomatic construction noted that x; therefore, and that it earned has no parallel construction to which it can be joined.

黑体的OG的解释是什么意思啊，有哪位NN能解释的更明确一些呢？谢谢了

1，B的the elephant无限制性修饰成分，the只能特指前面的东西。A有限制性修饰成分that gave rides to children at the Whipsnade Zoo ，所以A没有B的问题，A的the可以特指限制性定语从句所表示的对象。

2，A的时态关系是同时，所以B没有理由地更改了时态。

请指正。

用分词的大象——不是某个公园里（特定的）哪个赚钱多的大象，而是大家知道的任何赚钱那么多的大象

限定定语从句的大象——就是那个公园的那个赚钱多的大象

参考两个星星那题你就明白了

以下是引用hpp920在2004-8-20 10:35:00的发言：
看见tianwan的回复, 深深的感觉这是个真正的大牛呀!可惜考完就不常来了, 遗憾呀!

感慨于hpp920的这番话，其实，你们每个人都将成为牛人，只要你们有恒心和ETS战到底，刻苦钻研是唯一的出路。想起父亲的忠告：靠别人不如靠自己。

看了上面贴子，怎么对如下还是不清楚。ETS 是想表达用 ，giving rides 短语来修饰 the elephant 时其实表示一惯常已知的事实， 是如此么？

In B, the structure of noted... that the elephant, giving rides..., had been earning falsely implies that the reader already knows about the elephant—that is, that the existence of this particular elephant is not new information.

想请问: 我是因为看到后面的句子有个 “then”: what she then earned as director of adult education for London

所以选了B, 因为觉得大象的earning发生在前, and then Barbara的earning发生在后…

为什么说这两个动作是同时发生呢?