measures have been agreed upon/with/to/about

[joham]

The given answer to this test question below is A. But I would think all four are fine without context, and another possibility is nothing is needed for the blank. Could you please tell me if I am right.


She wants to know whether the measures have been agreed _______.
A. upon B. with C. about D. to

 

[Rover_KE]

I could accept them all or [nothing].

 

[MikeNewYork]

The given answer to this test question below is A. But I would think all four are fine without context, and another possibility is nothing is needed for the blank. Could you please tell me if I am right.


She wants to know whether the measures have been agreed _______.
A. upon B. with C. about D. to

I don't like the sentence with "nothing". We can agree upon/with/about/to measures, but I don't think we can agree measures.