[求助]大全702 关于C选项

1.        The British Admiralty and the War Office met in March 1892 to consider a possible Russian attempt to seize Constantinople and how they would have to act militarily to deal with them.CD

(A) how they would have to act militarily to deal with them

(B) how to deal with them if military action would be necessary

(C) what would be necessary militarily for dealing with such an event
                In C, necessary militarily is awkward and vague.

(D) what military action would be necessary in order to deal with such an event（D）

(E) the necessity of what kind of military action in order to take for dealing with it

  In C, necessary militarily is awkward and vague      WHY???