What two types of performance testing are appropriate for this project?

Universal Containers (UC) is implementing a Salesforce project with large volumes of data and daily transactions. The solution includes both real-time web service integrations and Visualforce mash -ups with back -end systems. The Salesforce Full sandbox used by the project integrates with full-scale back -end testing systems.

What two types of performance testing are appropriate for this project? Choose 2 answers
A . Pre -go -live automated page -load testing against the Salesforce Full sandbox.
B . Post go -live automated page -load testing against the Salesforce Production org.
C . Pre -go -live unit testing in the Salesforce Full sandbox.
D . Stress testing against the web services hosted by the integration middleware.

Answer: A,D