Which THREE lines below are valid entries in /etc/crontab and will work properly?

Which THREE lines below are valid entries in /etc/crontab and will work properly?

A.
0 23 * * 7 root tar cvf /dev/st0 /etc

B.
0 10 6 22 * /usr/local/bin/fs-report.sh

C.
0 17 * * 1 jdoe accouting-generation

D.
20 6 1 * * root graphicals-generations

E.
0 10 * * 2-6 tar cvf /dev/st0 /etc