不是nn,但是莎翁的名句就可以推翻这个理解:To be, or not to be, that is the question.
还有To speak English well is an advantage.
An infinitive 做subject,需要搭配linking verbs,但是不一定都是Infinitive + linking verb + Infinitive这个结构。
C错在to be able to do X has created ...这个搭配,create是一个physical verb,主语应该是个human or animal这类,不能是infinitive。
D错在being a supreme adapter以及its ability没有the ability来得准确。establish X as Y, itself 应该对应一个noun,不能是being...
其次,its ability说的是coyote's ability,这个句子没有特指coyote's ability,而是in general说了某种能力。