Which of the following was the first mathematical model of multilevel security policy?

A.
Biba

B.
Take-Grant

C.
Bell-La Padula

D.
Clark Wilson

Explanation:
“In the 1970’s, the US military used time-sharing mainframe systems and was
concerned about these systems and leakage of classified information. The Bell-LaPadula model
was developed to address these concerns. It was the first mathematical model of a multilevel
security policy used to define the concept of a secure state machine and modes of access and
outline rules of access.” Pg 212 Shon Harris: All-in-One CISSP Certification