pilots union

[GmatKiss]

Aviation officials have not only failed to determine the cause of the crash, but they have also ignored demands by the pilots union that the investigation should be expedited.

　　(A) crash, but they have also ignored demands by the pilots union that the investigation should be expedited

　　(B) crash but also ignored demands by the pilots union that the investigation be expedited

　　(C) crash but have ignored demands for expediting the investigation by the pilots' union

　　(D) crash, but they are also ignoring the pilots' union's demands to expedite the investigation

　　(E) crash: the demands by the pilots' union that the investigation should be expedited have also been ignored

[gmatblood]

IMO: C

[ice_rush]

(B) for me.


what's the OA?

[alex.gellatly]

In my opinion the answer needs two things. 1. It needs to be parallel to have ignored (present perfect). 2. It needs to follow the pattern not only....but also. only choice A has this.

Aviation officials have not only failed to determine the cause of the crash, but they have also ignored demands by the pilots union that the investigation should be expedited.

　　(A) crash, but they have also ignored demands by the pilots union that the investigation should be expedited

　　(B) crash but also ignored demands by the pilots union that the investigation be expedited not in the present perfect

　　(C) crash but have ignored demands for expediting the investigation by the pilots' union no also

　　(D) crash, but they are also ignoring the pilots' union's demands to expedite the investigation not in the preset perfect

　　(E) crash: the demands by the pilots' union that the investigation should be expedited have also been ignored wordy

What's the OA or expert's opinion?

[ihatemaths]

B should be the answer

[Gaurav 2013-fall]

IMO B