When Trying to Determine Why Users Are Unable to Access

Multiple Choice

When trying to determine why users are unable to access a web-based application that was working the previous day, which of the following should be the FIRST question to ask to determine the scope of the issue?

A) What has been changed on the web server since the previous day?
B) Is the application online for the end user to access?
C) Does the user have access to the application?
D) Is this a system-wide issue or just a certain user's issue?