A password history value of three means which of the following?

A.
Three different passwords are used before one can be reused.

B.
A password cannot be reused once changed for three years.

C.
After three hours a password must be re-entered to continue.

D.
The server stores passwords in the database for three days.

Explanation:
Password History defines the number of unique new passwords a user must use before an old
password can be reused.