What should the business analyst review and revise to provide more clarity to the team?

The development team at Universal Containers is reviewing several stories to be added to the current sprint. The team is having trouble with a particular story about an Opportunity email alert and is unsure about which type of testing is needed.

What should the business analyst review and revise to provide more clarity to the team?
A . Definition of done
B. User persona
C. Acceptance criteria

Answer: C