Warning: Auto-Config is working. Before configuring the device, stop Auto-Config. If you perform configurations when Auto-Config is running, the DHCP, routing,DNS, and VTY configurations will be lost. Do you want to stop Auto-Config? [y/n]:Refer to the output. When the administrator first starts the router, a system notice is displayed, however after rebooting this router, the notice disappeared. What is the reason for this? (Choose all that apply.)

A. This notice only appears during the very first device startup. B. The administrator has configured the device and saved the configuration, causing the notice to disappear. C. The administrator selected "˜n' and did not save the configuration. D. The administrator selected "˜y' and saved the configuration.