Which of the following could be considered a challenge when launching a new product?

Your product doesn’t have any reviews is the correct answer because one of the challenges when launching a new product on Amazon.com is the lack of customer reviews. Reviews play a significant role in influencing purchasing decisions, as customers often rely on feedback from other buyers to gauge the quality and reliability of a product. Without reviews, a new product may struggle to gain visibility and trust, making it harder to drive sales. While purchasing UPC codes and waiting for Amazon's approval may also be part of the process, they are not as directly related to the challenge of generating initial sales and establishing credibility, which is primarily impacted by the absence of reviews.