Which three statements are true concerning the use of the crontab utility?

Examine the commands and output related to the use of the cron facility:

Which three statements are true concerning the use of the crontab utility? (Choose three.)
A. The oracle user may list the root user’s crontab using cat /var/spoo1/cron/root
B. The oracle user may list the root user’s crontab using crontab -u root -1
C. The oracle user may not delete the root user’s crontab using crontab -u root -r
D. The oracle user may not modify the root user’s crontab using crontab -u root -e
E. The root user may not create the oracle user’s crontab using crontab -u oracle -e
F. The root user may not modify the oracle user’s crontab using crontab -u oracle -e

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