You must be familiar with the TCSEC ratings for your exam.
See our one page diagram with the TCSEC ratings at:
Some book authors and instructors claim there is no content about TCSEC on the exam. This is NOT true, the official ISC2 Book to the CBK still has multiple pages covering the TCSEC and for sure there are still questions about the TCSEC showing up on the exam. Ensure you review the PDF document above and you must know what is being introduce at each of the level under Mandatory Access Control (MAC).