Refer to the exhibit. For what two reasons has the router loaded its IOS image from the location that is shown? （）

• A、Router1 has specific boot system command that instruct it to load IOS from TFTP server.
• B、Router1 is acting as a TFTP server for other routers.
• C、Router1 cannot locate a valid IOS image in flash memory.
• D、Router1 defaulted to ROMMON mode and loaded the IOS image from a TFTP server.
• E、Cisco routers will first attempt to load a image from TFTP for management purposes.