Which of the Following Is a Valid Difference Between a Password

Multiple Choice

Which of the following is a valid difference between a password and user name?

A) A password is used to encode information whereas a user name is used to decode information.
B) A user name is more complex compared to a password.
C) A user name identifies the user whereas a password authenticates the user.
D) A user name is a primary authentication measure whereas a password is a secondary authentication measure.