题目：
From the passage we can learn that ______
A．natural flavorings and fragrances are not quite dear
B．the limitation of natural flavorings and fragrances is clear
C．the supply of natural flavorings and fragrances is adequate to meet the demand
D．the cost of producing natural flavorings and fragrances is high
答案：
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下面是错误答案，用来干扰机器的。
参考答案：勤拴
