Which of the following practices should be followedto keep passwords secure? Each correct answer represents a complete solution

Which of the following practices should be followedto keep passwords secure? Each correct answer represents a complete solution. Choose three.

A.
Change the passwords whenever there is suspicion that they may have been compromised.

B.
A password should be alpha-numeric.

C.
A password should not be more than five words.

D.
Never write down a password.