You should follow of the medicine, and take three pills every day.A. directionB. explanat

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A. direction
B. explanations
(答案→)C. instructions
D. methods
解析：考查名词辨义。directions 方向；复数形式directions可表示“产品、药品”的“说明”；
explanation解释; instruction指示；说明；method方法。结合句意“遵从药品说明”故选C。