Which sentence uses principal correctly?

Which pair of words shares the same suffix?
Which is the prefix in disappointedly?
biblio = "book"circum- = "around"crypto = "hidden"graph = "written"hemi- = "half"scribe = "write"sphere = "ball"
-al = "pertaining to"inter- = "between, among"judge = "decide"ment = "mind"nation = "country"
dia- = "with"log = "word"pro- = "before"
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