题目选项分析

Nutritionist: Your company's fruit-processing technologies add unacceptable amounts of copper to the orange juice you sell. Because copper blocks the absorption of Vitamin C, your advertising campaign claiming that your juice is a good source of Vitamin C is faulty and should be removed.

Juice Manufacturer: Some amount of copper is necessary for optimal health. Recent studies have shown that as many as 25 percent of Americans do not get enough copper in their diets; therefore, the benefits of the copper that our process adds to the juice outweigh the costs of any Vitamin C that it may block.

The juice manufacturer's response is flawed as a refutation of the nutritionist's argument because it

【选项】relies on the unfounded assumption that copper may be as good for health as Vitamin C.