The correct answer is:
c. A guarantee of purity and quality of content.
Explanation:
1. Name and place of manufacturer are required on a dietary supplement package label to inform consumers about the source of the product.
2. Quantity of contents and directions for use are essential information that must be provided to guide consumers on how to use the supplement correctly.
3. The Supplement Facts panel, which includes serving size, servings per container, and the amounts of nutrients in each serving, is a mandatory part of the label to provide transparency about the supplement's contents.
However, a guarantee of purity and quality of content is not a mandatory requirement on a dietary supplement package label. While many reputable manufacturers choose to include quality assurances or seals on their products, it is not a regulatory requirement for all dietary supplements.
