求助！！GWD17-Q36 我觉得文章提及的现象自我矛盾

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When a large body strikes a planet or moon, material is ejected, thereby creating a hole in the planet and a local deficit of mass.  This deficit shows up as a gravity anomaly:  the removal of the material that has been ejected to make the hole results in an area of slightly lower gravity than surrounding areas.  One would therefore expect that all of the large multi-ring impact basins on the surface of Earth’s Moon would show such negative gravity anomalies, since they are, essentially, large holes in the lunar surface.  Yet data collected in 1994 by the Clementine spacecraft show that many of these lunar basins have no anomalously low gravity and some even have anomalously high gravity.  Scientists speculate that early in lunar history, when large impactors struck the Moon’s surface, causing millions of cubic kilometers of crustal debris to be ejected, denser material from the Moon’s mantle rose up beneath the impactors almost immediately, compensating for the ejected material and thus leaving no low gravity anomaly in the resulting basin.  Later, however, as the Moon grew cooler and less elastic, rebound from large impactors would have been only partial and incomplete.  Thus today such gravitational compensation probably would not occur:  the outer layer of the Moon is too cold and stiff.

36. Q36:
The passage suggests that if the scientists mentioned in line 19 are correct in their speculations, the large multi-ring impact basins on the Moon with the most significant negative gravity anomalies probably
A.    were not formed early in the Moon’s history
B.    were not formed by the massive ejection of crustal debris
C.    are closely surrounded by other impact basins with anomalously low gravity
D.    were created by the impact of multiple large impactors
E.    were formed when the Moon was relatively elastic

题目我能了解。不了解的是原文意思。
科学家的的理论是，开始撞击之后，月球内部的物质填补了缺失的重力。然后现在，随着月球慢慢变冷，这种重力补充越来越小，所以现在没有补充。那么，这不是说明现在应该出现重力异常么？可是依据原文，1994年的数据表明没有出现重力异常，这不是说明科学家的方法是错的么。
但是这又和整个文章的感觉不符啊，文章应该是属于发现意外情况然后解释这种意外情况，其中解释应该是原文作者支持的吧，为什么会出现一个错误的解释呢。。。不知道我这样表达清楚了没有。。问题的关键就是现在到底是异常还是没有异常？希望各位说出自己看法！！谢谢大家！！

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顶一个！！！

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UP！！！

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没人来吗。。。。

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继续！！不能沉！！！

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还是没人来么？？？

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帮帮忙啊~

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继续顶一下。。