As a result of a recent incident, the user4 user is not allowed access to the crontab command. You need to remove the user’s current crontab file and make an entry in the appropriate file.
What two actions achieve this? (Choose two.)

A.
execute crontab -r user4

B.
place an entry in /etc/cron/cron.deny

C.
place an entry in /etc/cron.d/cron.deny

D.
execute crontab -d user4