The industry has pumped ________amounts of money into political campaigns, making it less and less likely that politicians will deal with the issue sensibly.
句意：该行业向政治竞选投入了大量资金，使得政客们越来越不可能理智地处理这个问题。potential潜能；可能性。substantial大量的；实质的。massive厚重的；强大的。traditional传统的；惯例的。根据句意可知，substantial最为符合。故正确答案为B。