Explanation
The recommended user voice format for writing a Story is to use the following template: As a <user role>, I want <goal or desire>, so that <benefit or value>. This format helps to capture the user's perspective, the user's need, and the user's outcome in a clear and concise way. The user voice format also helps to create a testable and valuable Story that can be prioritized and estimated by the Agile team. Therefore, the best example of the user voice format for the Story enabling book shoppers to access their shopping cart from any page on the website is: As a book shopper, I want access to my shopping cart from any page, so that I can review what I am purchasing. This example specifies the user role (book shopper), the goal or desire (access to shopping cart from any page), and the benefit or value (review what I am purchasing). References: Exam Study Guide: SP (6.0) - SAFe Practitioner, Story