In each question, one sentence is given in which certain words are in bold and numbered from A to E. Below the sentence are given five options with possible pairs of interchange of those bold words. Choose the pair(s) of words which are needed to be interchanged to make the sentence grammatically correct and meaningful.

Airtel and Vodafone Idea, which have been (A)dominant to compete with Reliance Jio’s (B)struggling presence in the market, are on the ropes after the Supreme Court verdict (C)upholding the department of telecommunication’s (D)interpretation of adjusted gross (E)revenue.