Directions: In the following sentence, four words given in bold are marked as A, B, C, and D, which are possible pairs to be interchanged. Choose the pair(s) of words that need to be interchanged to make the sentence grammatically correct and meaningful. If no interchange is required, mark option 5 i.e., "No interchange required" as your answer.

Policymakers remain vigilant (A) in their momentum (B) to slowing price gains towards the 4% target to avoid dampening (C) consumption and undermining economic growth commitment (D).