Which two factors should you ascertain from the tester?

You create Microsoft Windows-based applications.
You create an application that requires users to be authenticated by a domain controller.
The application contains a series of processor intensive method calls that require different database connections.
A bug is reported during testing.
The bug description states that the application hangs during one of the processor-intensive calls more than 50 percent of the times when the method is executed.
Your unit test for the same method was successful.
You need to reproduce the bug.
Which two factors should you ascertain from the tester? (Each correct answer presents part of the solution. Choose two.)

A.
Security credentials of the logged on user

B.
Code access security settings

C.
Hardware settings

D.
Network settings

E.
Database settings