單項選擇題

The ios of a north american cisco aironet 1230 series access point has become corrupt, 
necessitating the need for a tftp firmware reload.
Before you press and hold the mode button,what must the file be named in order for the reload to occur?()

A.c1200-k9w7-tar.default
B.c1200-k9w7-tar.boot
C.c1200-k9w7-tar.123-7.ja1.tar
D.c1200-k9w7-tar.recover

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