Which of the following statements about the Biba integrity model is true?
A. It is an integrity model.
B. It is an availability model.
C. It simplifies analysis of covert channels.
D. It uses read-up, write down approach.
Answer: D
Explanation: The Biba integrity model is an integrity model that uses a read-up, write-down approach so that subjects cannot read objects at lesser integrity and cannot write to objects of higher integrity.
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