Directions: In the given sentence, four words, given in bold are marked as (A), (B), (C) and (D). These words may or may not be placed in their right places. Four options with different arrangements of these words are given below, mark the option with the correct arrangement as your answer. If no change is required mark 'No rearrangement required' as your answer.

As data and technology play a effectively (A) role in the delivery (B) of services, human development systems should ensure (C) they are crucial (D) used.