问题：

[单选] Which two commands should be entered on a WLAN controller to remove any residual configuration？（）

A .  Enter the clear controller command followed by the reload command.
B .  Enter the clear controller command followed by the reset command.
C .  Enter the clear controller command followed by the reset system command.
D .  Enter the erase startup-config command followed by the reload command.
E .  Enter the erase startup-config command followed by the reset command.
F .  Enter the erase startup-config command followed by the reset system command.