题目选项分析

Consumer Advocate: Your soft drink product contains high levels of an amino acid linked to decreased brain functioning. Therefore, your product should be taken off the market.

Soft-drink Company Manager: Our product is safe for consumer use. We use a production process that reduces levels of that amino acid.

The bolded phrases play which of the following roles in the arguments above?

【选项】The first phrase expresses the advocate's position and the second phrase contains the manager's evidence for an opposing view.