单选题

Which of the following scenarios would best sport the position given in Passage 2 ?

A The gradual migration of a herd of elephants into new territory due to a shortage of water and food in their original habitat

B An increase in prehensile taft strength after a species of monkeys began living among taller trees to avoid terrestrial predators

C The sudden extinction of a breed of wild donkeys following a dramatic change in climate

D The discovery of prehistoric fossils demonstrating the existence of a creature with both mammalian and amphibious characteristics

E The discovery of a previously unknown species of crocodile in waters traditionally considered too cold for reptiles

解析：
第二篇文章的作者认为尽管一个物种内发生的微小变化使这个物种的生存机会增加，但是新的物种不会形成。这种观点和B中描述的情况符合。