What information must be disclosed to models during product testing?

The correct choice emphasizes the importance of transparency in product testing procedures. When models participate in testing cosmetics or beauty products, they must be fully informed about the specific testing procedures that will be conducted. This is crucial not only for ethical reasons but also to ensure the safety and well-being of the models involved. Understanding the methods being used allows models to make informed decisions about their participation and to be aware of any potential risks or reactions associated with the products being tested.

While knowing the name and address of all product manufacturers, the date of the model’s last salon visit, or results from previous product tests might provide some context or be relevant in certain situations, these details are not as critical as understanding the procedures that directly affect the model’s experience and safety during the testing.