In the sentence, certain words are in bold and numbered from A to H, which are the possible pairs to be interchanged. Choose the pair(s) of the words that need(s) to be interchanged to make the sentence grammatically correct and meaningful.

a. The committee hurdles(A) that the director of the community(B) services should faced(C) as many mini-recycling centres as the budget allows(D).

b. The company introduce(E) severe financial opined(F) due to parochial(G) planning and lack of prudence(H).