When upgrading the IOS image, the network administrator receives the exhibited error message. What could be the cause of this error（）。

• A、The new IOS image is too large for the router flash memory.
• B、The TFTP server is unreachable from the router.
• C、The new IOS image is not correct for this router platform.
• D、The IOS image on the TFTP server is corrupt.
• E、There is not enough disk space on the TFTP server for the IOS image.