To her disappointment, what she had devoted herself to in nothing but failure.

To her disappointment, what she had devoted herself to       in nothing but failure.

A.resulting

B.results

C.has resulted

D.resulted

答案及解析： D

解析：

考察句子结构。句中主语是what she had devoted herself to，resulted是谓语动词。结合句意可知D正确。句意：让她失望的是，她一直致力所做的事情最终带来的只有失败。