After returning from vacation, a user is unable to connect to the network at the corporate office. Windows allows the user to log in; however, no internal or external websites are accessible when running a browser. The user's expected network shares are unreachable, and all websites attempted return the message, "Hmm, we can't reach this page." Which of the following is the MOST likely cause of this issue?


A. The user's password expired while on vacation.
B. The user clicked on a malicious email.
C. The user connected to a captive portal while traveling.
D. The user enabled airplane mode.