As you're helping a user configure her e-mail over the phone, she remarks that the IP address is different than it was when she checked last week. This surprises her, since she didn't make any changes to her TCP/IP configuration. The user has had no problems running her web browser. You immediately know that:

D. Her computer is a DHCP client.

Explanation:

Since in the question it is mentioned that IP address is different as compared in the previous week also the user did not make any changes with respect to the TCP/IP configuration and the system is working well

So this situation represents that the user computer is a client of DHCP as it deals with the client-server protocol in which it automatically generates the IP i.e Internet protocol along with the IP address

Hence, the correct option is d.

answerhard disks;