Strengthening the Argument for a Nutritional Supplement

Very Easy Critical Reasoning Strengthening Arguments

In a recent advertisement for a nutritional supplement, the company claimed that its product increases energy levels significantly. To support this claim, the company cited a study that found participants taking the supplement reported feeling more energetic than those who did not take it. However, it is unknown whether the participants’ energy levels were measured objectively or simply through self-reports.

Which of the following, if true, would most strengthen the company's argument?

The participants in the study were all professional athletes.

Participants reported feeling more energetic than their usual energy levels before taking the supplement.

The study included a placebo group that reported lower energy levels.

The study measured energy levels using a well-established scale.

Hint

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