What does the Bell-LaPadula model NOT allow?

A.
Subjects to write to a higher level of security relative to their level of security

B.
Subjects to read from a higher level of security relative to their level of security

C.
Subjects to read at their same level of security

D.
Subjects to read from a lower level of security relative to their level of security

Explanation:
The other options are not prohibited by the model.