Which of the following commands creates an ext3 filesystem on /dev/sdb1?

Which of the following commands creates an ext3 filesystem on /dev/sdb1? (Choose TWO
correct answers.)

A.
/sbin/mke2fs -j /dev/sdb1

B.
/sbin/mkfs -t ext3 /dev/sdb1

C.
/sbin/mkfs -c ext3 /dev/sdb1

D.
/sbin/mke3fs -j /dev/sdb1