Before displaying a new dress for customers, what should the sales associate do?

The most appropriate action for the sales associate before displaying a new dress for customers is to learn multiple uses by trying on the dress. This practice allows the associate to become familiar with the fit, style, and versatility of the dress, enabling them to provide informed recommendations to customers. By trying on the dress, the associate can effectively communicate the benefits and potential outfits that can be created with the dress, enhancing the customer's shopping experience. This approach also helps in understanding how the dress looks and feels, which is crucial for answering any questions that customers may have.

The other options, while they may have some relevance, do not contribute as directly to being an effective sales associate in the context of displaying merchandise to customers. For example, photocopying an illustration might not provide the personal touch needed in a retail environment. Checking for an inspection sticker is important for safety and compliance, but it does not inform the associate about the product's presentation or versatility. Ensuring safe unpacking of merchandise is a logistical detail that, while necessary, does not directly enhance customer interaction or understanding of the product.