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.

In the last week of December last(A) year, 35 Himalayan environmental (B)of India met in Mumbai demanding a green bonus (C), or payment for States (D) services they provide to the country(E).