Schweser practice exam 1 - guardian investor type?

The morning session asks a question about an investor to which the answer is guardian. I don’t remember anything about thjw classification in the materials. I know cautious, methodical, adventurer and individualist but never saw guardian. Is this a schweser mistake or did I miss something?

its in chapter 7 part of BB&K model. Try CFA book if its not in Schweser but I"m pretty sure I wrote it down in my notes from Schwesers.