How is logwatch started even if it is not listed in the crontab -l output for the root user?

A.
/etc/log.d/scripts/logwatch.pl is automatically run as per the soft link 00-logwatch in the
/etc/cron.daily directory.

B.
/etc/log.d/scripts/logwatch.pl is automatically run as per the soft link 00-logwatch in the
/etc/cron.d directory.

C.
/etc/log.d/scripts/logwatch.pl is automatically run as per the soft link 00-logwatch in the
/etc/cron.hourly directory.

D.
/etc/log.d/scripts/logwatch.pl is automatically run as per thelogrotate script in the /etc/cron.daily
directory.