The user story that most accurately represents the goal is B. As a site administrator of the CK website, I want to make sure that the web server can process requests at 150% of the average traffic rate during the latest promotion. This user story clearly defines who (site administrator), what (make sure that the web server can process requests), why (during the latest promotion), and how (at 150% of the average traffic rate). This user story also aligns with the goal of performing stress testing for an upcoming promotion, which is a type of testing that evaluates how a system performs under extreme load or demand. The other options are either inaccurate or incomplete. Option A is inaccurate because it does not represent the goal of stress testing, but rather the goal of usability testing, which is a type of testing that evaluates how easy and intuitive a system is to use. Option C is incomplete because it does not specify how (at what rate or level) to make sure that shoppers can complete their purchases without disruption. References: https://trailhead.salesforce.com/en
/content/learn/modules/business-analysis-user-stories/write-user-stories