Help！新G绿皮书中的一道阅读题！！！

lifanscutUID: 3070810

这道题我查过，是国内90-94，有人说这个时期的题不是很难，但我怎么觉得这个题的答案我是如何都不能认可，请各位XDJM帮忙解答。（国内91年4月）
    The recent, apparently successful prediction by mathematical models of an appearance of EI Nino--- the warm ocean current that periodically develops along the Pacific coast of South America---has excited researchers. Jacob Bjerknes pointed out over 20 years ago how winds might create either abnormally warm or abnormally cold water in the eastern equatorial Pacific. Nonetheless, until the development of the models no one could explain why conditions should regularly shift from one to the other, as happens in the periodic oscillations between appearances of the warm EI Nino and the cold so-called anti-El Nino. The answer, at least if the current model that links the behavior of the ocean to that of the atmosphere is correct, is to be found in the ocean.

Which of the following best describes the organization of the first paragraph?
B) A model is described and evaluated.
C) A result is reported and its importance expained.

我选了B，但是答案选了C。
确实有些不太理解，想让大家帮助解答，先谢过了。

szmanutdUID: 2727152

until the development of the models no one could explain why conditions should regularly shift from one to the other, as happens in the periodic oscillations between appearances of the warm EI Nino and the cold so-called anti-El Nino.

B选项 no model  is actually described, even no mention the evaluation
C就是对文章的了解了 现实描述了EI NINO的现象 importance就是对最后一句的理解 即this answer is to be found.

lifanscutUID: 3070810

谢谢斑竹哈~~我理解了嘿嘿 2# szmanutd