The three classic ways of authenticating yourself to the computer security software are: something you know,
something you have, and something:

A.
you need.

B.
you read.

C.
you are.

D.
you do.

Explanation:
There are three common factors that can be used for authentication:
Something a person knows.
Something a person has.
Something a person is.
Incorrect Answers:
A, B, D: These answers are not valid classic authentication factors.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 162