What are three methods to reduce Mysql server exposure to remote connections?

What are three methods to reduce Mysql server exposure to remote connections?

A.
Setting — skip-networking when remote connections are not required

B.
Using the sql_mode=STRICT_SECURE after connections are established for encrypted
communications

C.
Setting specific GRANT privilege to limit remote authentication

D.
Setting – mysql_secure_configuration to enable paranoid mode

E.
Using SSL when transporting data over remote networks