You are designing an ASP.NET Web application that will be deployed both to a server that
runs IIS 6 and to a server that runs IIS 7.0. The Web application must meet the following
requirements: Log all unhandled exceptions. Write exception details to a custom error log.
When an exception occurs, write the user credentials to a custom error log. You need to
recommend an approach for handling errors. What should you recommend?

A.
Create an error handler for the Application_Error event.

B.
Create an error handler for the HttpApplication.LogRequest event.

C.
In the customErrors element of the Web.config file, set the defaultRedirect attribute to
errors.htm.

D.
In the customErrors element of the Web.config file, set the mode attribute to On.