Answer:
with
Explanation:
because with is a preposition.
The answer is *Which had undergone a complete makeover.* Adjective clauses identify the word it's modifying.
I'm not exactly sure, but I think this statement is true, although the antagonist can sometimes be a rival to the protagonist without knowing. It really depends.
C Sweet Voice
Synesthesia has to do with stimulating senses.
I hope this helps:)