In the sentence, certain words are in bold and numbered from A to E, which are the possible pairs to be interchanged. Choose the pair(s) of words which need to be interchanged to make the sentence grammatically correct and meaningful. 

At present, each (A) sovereign state has complete (B) individual freedom, subject only to the (C) cease of war but this individual freedom will have to be (D) curtailed in regard to external relations if wars are ever to (E) sanction.