In the given questions, parts of the sentence are separated as A, B, C and D. Of these, the positions of two or more parts may be incorrect and need to be exchanged to make the sentence correct. Find the parts which need to be exchanged. In case the given sentence is correct, your answer should be ‘No improvement’

Throughout the week, activists (A) plan to take action around the city, at government departments, to protest (B) the market, then later move on to London City airport, where they intend (C) to stage a three-day blockade. (D)