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. 

My mother was my (A) oracle during the first six years of childhood, (B) resolving my (C) satisfaction and answering my questions. I was happy—very happy! and still look back to those days with (D) indescribable pleasure and (E) difficulties.