A user reports that settings on the SOHO Wi-Fi router are being changed. Which of the following is the BEST course of action to prevent unwanted changes in the future?

A.
Change the default password of the administrator router login account.

B.
Enable a stronger password for the SNMP reporting functionality of the router.

C.
Change the internal IP of the router.

D.
Set the DHCP lease expiration time to half of its current value.