You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: ADD A LETTER 
Clue: Confer if you wish, but if you add a letter to "confer", it becomes this type of evergreen
conifer

Category: MASADA 
Clue: Masada is dominated by the remains of the palace of this infamous New Testament king called "the Great"
herod

Category: COLLEGES & UNIVERSITIES 
Clue: In the 1850s this Massachusetts educator founded Antioch College & became its first president

horace mann