问题
单项选择题
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
参考答案：D
解析：[分析] 细节题型。 见第一段第一句：Natural flavorings and fragrances are often costly and limited in supply．因此选项D为答案。