Which statement describes the proper method to maintain persistent changes across reboot?

A.
Changes made to the startup-configuration (by entering commands in config mode), should be saved to the start-up configuration so that changes will persist during reboots

B.
Changes made to the startup-configuration (by entering commands in EXEC mode), should be saved to the start-up configuration so that the changes will persist during reboots

C.
Changes made to the running-configuration (by entering commands in config mode), should be saved to the start-up configuration so that the changes will persist during reboots

D.
Changes made to the running-configuration (by entering commands in EXEC mode), should be saved to the start-up configuration so that the changes will persist during reboots