Following the lattice model for the military security policy, a user is cleared for < secret; {BULLRUN, XKEYSCORE, PRISM} >. Which of the following classified documents can this user access? Group of answer choices < secret; {MYSTIC} > < secret > < secret; {PRISM} > < top secret; {BULLRUN} > < secret; {PRISM, XKEYSCORE} > < confidential; {XKEYSCORE, PRISM, BULLRUN} > < confidential; {MYSTIC} >