Which two approaches should you recommend?

An organization is planning to migrate to Dynamics 365 Finance.

The organization reports that the legacy system has failed during peak sessions. You need to recommend an approach that will handle peak session volume.

Which two approaches should you recommend? Each correct answer presents part of the solution . NOTE: Each correct selection is worth one point.
A . Use performance and load testing.
B . Configure a single box development environment.
C . Perform user integration testing.
D . Optimize server configuration.

Answer: A,D