from Manhattan:
Eliminate all the options with "they had anticipated" because they has no clear referent.
A,C and E are out.The fight remain between B and D.
D uses "unforseeable" which is an unidiomatic construction. To be concise more elaborate, I present these two sentences.
1. The fog is unable to be seen by the people ir The fog is incapable of being seen by people.
2. The fog cannot be seen by people.
没有被预知的天气，而不是不能被预知的天气
为什么不选c：因为从O had fewer job-related accidents last year到O are less likely to have job-related accidents这个逻辑在不给b条件前是没有漏洞的，譬如他一天读一本书，她一天读三本书，所以她读书效率比他高肯定是对的，不能因为说他那段时间生病了所以削弱她效率更高这件事，这可以是解释的原因，但绝对不是对结论的削弱，因为结论讨论的并不是他们的aptitude，结论讨论的也是一种现象。
if you don't like '...than was the case', you should learn to like it; this is one of those phrases that the gmat writers use to refer to concepts that don't fit under the usage constraints of traditional pronouns. (another popular one of these constructions is 'do so'.)
1. it属于准确指代，即it指代的energy就是前句说的more than ten times as much energy，然而这里指的是两个不同的energy，而不是同一个energy，所以要用was the case来代替。it的前置词是无意义的，所有使用it的都是错误的选项。
2.只能用the case概括，C选项是一个倒装：the case was in 1990
3.as……as结构
1.incidentally, in the official correct sentences, i\'ve never seen \'as well as\' followed by anything other than a noun. (remember that \'__ing\' can be a noun; that\'s the role played by \'emitting\' here.) as well as是介词，后面通常接名词（Ving也是名词形式）
2.having done (without a comma) 永远不对，因为完成时态表示一个永久的状态，而Ving表示一个暂时的状态，二者矛盾
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为什么CD是不能选的：因为文章所谓的“过度控制”是指不加区分地对所有排放进行控制，为了保证不“过度控制”，那只能对所有排放物进行限定，即他们必须多多少少都有害，都值得被控制，才不会“过度”。
而C选项是对国家进行限定，首先“同意的国家”这个范围就不是很对，因为控制这个提案应该是针对所有与会国家的，连主体都不对，还何来过度不过度呢？；其次，对国家的限定不符合文意，除非原文改成：不加区分地要求全世界各国对排放进行控制，为了不“过度”需要条件：全世界各国的排放都多多少少影响了north sea
D选项和“过度”根本就没有关系，他的点更像是“控制”或者“不控制”，而不是过度不过度