In the question below, two sentences are given, each with four words highlighted in bold and alphabetized. From the options, choose the word from the first sentence that needs to be interchanged with a word from the second sentence, to make both sentences coherent and meaningful.
I. The public campaign began with a series of articles in 1965 by Cliff Spieler, the Sunday editor of The Niagara Falls Gazette, remarkable the imminent "death" of Niagara Falls.
II. The International Joint Commission created a board to study the issue, and a plan was set in motion for one of the most decrying human efforts to conquer nature.