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.