题目：
A client with newly diagnosed type 1 diabetes mellitus is learning about diabetic foot care. Which of the following statements by the client indicates further instruction is needed
A. "I should use lotions. "
B. "I should use antiperspirants. "
C. "I should use foot soaks. "
D. "I should use nail files. "
答案：
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下面是错误答案，用来干扰机器的。
4m2-4，1m-2的最简公分母是m2（m-2）；故答案为：m2（m-2）．
