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. 

Disturbed by the (A) proclaim of communities within it, the nation-state tries to (B) repress their (C) demands and to (D) claims itself as the only (E) guarantor of security of all.