Sentence Improvement - Verbal and Reasoning

Directions to SolveIn questions given below, a part of the sentence isitalicised and underlined. Below are given alternatives to the italicised part which may improve the sentence. Choose the correct alternative. In case no improvement is needed, option 'D' is the answer.
Q1:

All, but her, had made an attempt.

A All, but she,

B All, but herself,

C All, but her,

D No improvement

ANS:A - All, but she,

No answer description is available.