what two reasons has the router loaded its IOS image from the location that is shown?

Refer to the exhibit:

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

A.
Router1 has specific boot system commands that instruct it to load IOS from a 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 an image from TFTP for management purposes.