An organization is transitioning its digital platform to AEMaaCS. The lead architect is overseeing the transition and ensuring that the platform remains robust and offers a consistent user experience. The team has already performed general functionality tests. As the launch date approaches, the team is focusing on potential real-world challenges, such as the platform's behavior under high-user traffic and communicating with third-party services.

Which two types of testing should the architect prioritize next to ensure a seamless transition to AEMaaCS? (Choose two.)