单选题A System p administrator is reviewing root’s command history on a development server and finds that a junior adminstrator had been attempting to correct a full file system. One of the following commands caused damage that must be corrected. Which command was it（）Arm /var/preserve/*Bcat /dev/null /var/adm/cron/logC /var/adm/wtmpDrm /var/adm/ras/errlog
单选题
A System p administrator is reviewing root’s command history on a development server and finds that a junior adminstrator had been attempting to correct a full file system. One of the following commands caused damage that must be corrected. Which command was it（）
A
rm /var/preserve/*
B
cat /dev/null > /var/adm/cron/log
C
> /var/adm/wtmp
D
rm /var/adm/ras/errlog
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