You are at the initial stage of troubleshooting a server based issue, from which of the following sources should you gather information on the current issue?

A.
The individual which reported the issue.

B.
Users that work in the same environment as the specific individual that reported the issue.

C.
Both of the above.

D.
None of the above

Explanation:
You should investigate whether the user that reported the issue is possibly the source of the issue. You need to determine whether the user understands how the system should be used and whether the user performed an invalid transaction. Speaking to users that work in the same environment as the specific individual which reported the issue would assist you in determining whether other users are experiencing the same issue.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 486-488.