What should you do?

You work as the network administrator at Domain.com. The Domain.com network consists of a single Active Directory domain named Domain.com. The company runs Windows Server 2008 on all the servers on the network. You receive an instruction from the CIO to identify all logon attempts on the domain controllers that has failed.
What should you do?

A.
You should consider viewing the Netlogon.log file.

B.
You should consider running Event Viewer.

C.
You should consider viewing running the Security and Configuration Wizard.

D.
You should consider viewing the Security tab on the domain controller computer object.