Universal Container Salesforce manager has a big project to be implemented in sandbox, but this project will require performance and load testing in addition to staging. He needs to be able to refresh the sandbox on monthly basis as well. Which sandbox environment is the best option for him?

Answer options:

A.Developer Sandbox
B.Full Sandbox
C.Partial Sandbox
D.Full Pro Sandbox

Correct Answer: B 
Full Sandbox is the only sandbox that supports performance and load testing in addition to staging. It is like a mirror to the production environment with all the data carried over. 
Option A is incorrect because developer sandbox doesn’t support performance, load testing and staging. Developer sandbox carries over the metadata from production. 
Option C is incorrect because partial sandbox doesn’t support performance, load testing and staging. It can be refreshed on weekly basis as well and it includes a sample of production data. 
Option D is incorrect because there is no sandbox called full pro sandbox. There are only four types of sandboxes: Developer, Developer pro, partial and full sandbox. 

https://help.salesforce.com/articleView?id=create_test_instance.htm&type=5