Sentence Correction

monge1980 wrote:

The secretary of war expressed the conclusion, on which there was general agreement, that we could not give the Japanese any warning, that we could not concentrate on a civilian area, but that we should seek to make a profound psychological impression on as many of the inhabitants as possible.

a. on which there was general agreement, that we could not give the Japanese any warning, that we could not concentrate on a civilian area, but
b. to which there was general agreement, that we could not give the Japanese any warning, that we could not concentrate on a civilian area, but
c. which the agreement on was general, that we could not give the Japanese any warning, that we could not concentrate on a civilian area, but
d. on which there was general agreement, that the Japanese could not receive any warning, that civilian areas could not be concentrated on, and
e. and there was general agreement to it, that we could not give the Japanese any warning, that civilian areas could not be concentrated on, and

I have a question for you, experts:

the rules say that we can use either "agree with a person" or "agree upon/to something". That said I think that the correct answer should be

B)to which there was general agreement, that we could not give the Japanese any warning, that we could not concentrate on a civilian area, but

If the rule is true, we couldn't say " there was general agreement on a conclusion", but "to a conclusion".

What do you think?

anujan007 wrote:I chose B as well. It was pretty much down to A and B using the contrast introduced by the conjunction "but".

Choosing between A and B was quite tough.