Which user story most accurately represents the goal?

The business analyst (BA) at Cloud Kicks (CK) is writing user stones for an upcoming Commerce Cloud website release. One of the requirements from the technical team is to perform stress testing for an upcoming promotion. The BA is translating the requirement into a user story.

Which user story most accurately represents the goal?
A . As a visitor to the CK website, I want to make sure that I can shop without disruption during a large promotion so I have a frictionless shopping experience.
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.
C. As a user, I want to make sure that shoppers on the CK website can complete their purchases without disruption during the newest promotion.

Answer: B