What are three actions performed by the mysql_secure_installation tool?

A.
It prompts you to set the root user account password.

B.
It checks whether file permissions are appropriate within datadir.

C.
It asks to remove the test database, which is generated at installation time.

D.
It can delete any anonymous accounts.

E.
It verifies that all users are configuration with the longer password hash.

Explanation:
Reference: http://prefetch.net/blog/index.php/2006/06/18/securing-mysql-installations-withmysql_secure_installation/