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. 

Engineering is a force (A) testify with (B) stupendous possibilities, therefore, nobody can very well (C) deny and that it is a force generally (D) exercised for good— despite the World War—I myself, as an engineer, can truly (E) fraught.