Which two commands would achieve this?

You determine that a certain user, user1, is using excessive disk space. To achieve the best
space reduction with minimum effort, you want to gather information to help user1 decide which
files or directories to back up. You also want to illustrate that user1 is using more space than
others. Which two commands would achieve this? (Choose two.)

A.
ls -alR /export/home/user1

B.
du -hs /var/opt