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

In today's schools, (A)exceptional children--including children with (B)regular deficits--are to be (C)restrictive in the least (D)educated environment, typically the (E) intellectual classroom.