单选题 An underlying assumption of most market research is that people are continually ______ financial decisions based on their desire for goods that give them the most satisfaction.
【正确答案】 A
【答案解析】[解析] 句意：大多数市场调查的潜在假设是人们总是根据自己对满意度最高的商品的需求做出经济决策。continually表示“一贯如此”，常与现在进行时连用，即are后面接动词ing形式。