问题：

[单选]

You are the network administrator for your company. All network servers run Windows Server 2003. Business hours are 8 A.M. to 5 P.M. You provide network assistance during business hours only.
A server named Server1 stores personal files for all network users. Mobile users access Server1 by using the company's VPN. They must have 24-hour access to the files on Server1.
You need to be able to identify the source of the recurring slowdowns in VPN access.
First, you log on to Server1.
What should you do next?（）

A . Use Task Manager to review network utilization of the VPN adapter.
B . Use the Performance console to create a log of network utilization outside of business hours.
C . Use System Monitor to review network utilization of the VPN connection.
D . Use Task Manager to select Bytes Sent as the Network Adapter History setting.