You are designing a system for a law firm that represents multiple competing corporations. The system must:
- Prevent lawyers from accessing case files of competing clients
- Ensure paralegals can enter data but only senior attorneys can approve filings
- Maintain confidentiality of client records
Which combination of models is most relevant here?
A. Bell–LaPadula and Biba
B. Clark–Wilson and Brewer–Nash
C. Bell–LaPadula and Clark–Wilson
D. Brewer–Nash and Biba