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.

Wealthy countries that have (A) automated land- and ocean-based (B) instruments, as well as satellites, to (C) gauge temperature (D) changes and other readings mostly have done so with fully or partly (E) deployed systems.