¿Cuál de los siguientes podría considerarse un desafío al lanzar un nuevo producto?

A new product lacking reviews is a significant challenge because customer reviews build trust and provide social proof, which are crucial for driving sales on Amazon. Without reviews, potential buyers have less information to base their purchasing decisions on, making them less likely to choose an unfamiliar product over one with established feedback. Buying multiple UPC codes is a standard operational cost, not a launch challenge. Amazon's authorization process is a necessary step, but typically a procedural one, not an inherent challenge to the product itself.