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.

The suspension of data services, phone calls and texting to (A)curb protests in parts of Delhi was an (B)authoritarian milestone for a (C)tactic that is becoming an (D)increasingly common tool for (E)inauspicious governments – but practised most often by India.