Which method should a Solution Architect consider in this scenario to validate the requirements during the build sprint without impacting the project timelines?

Towards the end of the discovery phase, the sales manager and subject matter experts raise a request to get hands-on experience with the solution as soon as possible. They want to ensure the requirements they provided are correctly built out in Salesforce. The project sponsor is unsure how that request may affect the schedule.

Which method should a Solution Architect consider in this scenario to validate the requirements during the build sprint without impacting the project timelines?
A . Ensure the project sponsor reviews and signs off on the Functional Specification Document as an acknowledgment that what was built aligns with the original requirements.
B. Run a User Acceptance Testing discovery session, based on the Functional Specification Document, to ensure the testing script meets the end users’ needs.
C. Give every end user the Functional Specification Document as their training materials and test them on the contents.
D. Give the end users access to a sandbox environment and a testing script for each of the user stories. Ask UAT testers to perform their tasks and collect feedback from them in the testing script.

Answer: A