Memory management in TCSEC levels B3 and A1 operating systems may utilize "data hiding". What does this mean?

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answerhappygod
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Memory management in TCSEC levels B3 and A1 operating systems may utilize "data hiding". What does this mean?

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Memory management in TCSEC levels B3 and A1 operating systems may utilize "data hiding". What does this mean?

A. System functions are layered, and none of the functions in a given layer can access data outside that layer.
B. Auditing processes and their memory addresses cannot be accessed by user processes.
C. Only security processes are allowed to write to ring zero memory.
D. It is a form of strong encryption cipher.
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