Which mode of operations has objects and subjects with various security labels, from least to most secure or trusted?

Which mode of operations has objects and subjects with various security labels, from least to most secure or trusted?

A.
Compartmented

B.
Dedicated

C.
Multilevel Secure

D.
System High

Explanation:
Answer C is correct; Multilevel secure mode has mixed objects and subjects: the reference monitor mediates access between subjects and objects.

Incorrect Answers and Explanations: A, B, and D: Answers A, B, and D are incorrect. Compartmented mode has mixed objects, and subjects must have a clearance matching the highest object label in the system, as well as a need to know. Dedicated mode has objects of one classification level; subjects must possess a clearance at least as high as the objects label. System high mode has mode has mixed objects, and subjects must have a clearance matching the highest object label in the system.