What Orange Book security rating is reserved for systems that have been evaluated but fail to meet the criteria and requirements of the higher divisions? 

Answer options:

A. A
B. D
C. E
D. F

B

D or "minimal protection" is reserved for systems that were evaluated under the TCSEC but did not meet the requirements for a higher trust level. A is incorrect.A or "Verified Protectection" is the highest trust level under the TCSEC. E is incorrect.The trust levels are A - D so "E" is not a valid trust level. F is incorrect.The trust levels are A - D so "F" is not a valid trust level. CBK, pp. 329 - 330 - AIO3, pp. 302 - 306