XDF 26－Q1

已经搜索过大全，未找到此题，特贴出与诸位探讨：

Scientists claim that the discovery of the first authenticated mammal bones in amber could provide important clues of determining, in addition to how, when mammals colonized the islands of the West Indies.

A.  of determining, in addition to how, when mammals colonized the islands of the West Indies.

B. in the determination of how and when the islands of the West Indies were colonized by mammals

C. to determine how mammals colonized the islands of the West Indies and when they did

D. for determining when the islands of the West Indies were colonized by mammals and how they were

E. for determining how and when mammals colonized the islands of the West Indies.

我根据主动优先原则以及简洁性原则找到了正确答案E，但是在LONGMAN上查了clue的用法是跟to和about。这里用for岂不是有问题？另外，是否还有其他的原则和语法点来排除其他几个错误选项。谢谢！