单选题Companycom has been performing scheduled backups of their data to tape using "tar" in a script for over one year with no problems. Recently, the tar command is returning a non zero return code during the backup phase, causing the script to fail. What is the primary cause of this problem?（）AThe files have grown to over eight gigabytes in sizeBThe file systems are corrupt, and fsck should be runCThe tape block size has been changed from the defaultDThe user’s limit has been changed to less than eight gigabytes
单选题
Companycom has been performing scheduled backups of their data to tape using "tar" in a script for over one year with no problems. Recently, the tar command is returning a non zero return code during the backup phase, causing the script to fail. What is the primary cause of this problem?（）
A
The files have grown to over eight gigabytes in size
B
The file systems are corrupt, and fsck should be run
C
The tape block size has been changed from the default
D
The user’s limit has been changed to less than eight gigabytes
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