单选题 The floor manager must take every ______ to make sure that no one at the assembly line is injured.
【正确答案】 A
【答案解析】[解析] 词汇：动词
1．这是一道词汇题，选项均为名词。
2．take precaution意为“防范”，因此A为正确选项。
3．take measures/steps/action均意为“采取措施”。