关于prep旧 110题 未划线部分的用法 “with"

roundroundyy

prep
110
The ivory-billed woodpecker, once the largest woodpecker in North America at a striking 20 inches

tall, has moved in and out of the extinct category, with scientists consistently unable to find solid

proof for the bird to still exist.

请问这是with的什么用法呢？with 后面跟的unable是形容词阿？谢谢！


(A) for the bird to still exist

(B) for the bird as still existing

(C) for the bird's continued existence

(D) that the bird still exists

(E) of the bird and its continued existence

roundroundyy

在prep上查到了，谢谢阿！