The answer is C: Mementos
A. Manacles: two metal rings in a chain that are put around the hands or feet of prisoners.
B. Protocols: system of rules and acceptable behavior used at officials cerimonies and occasions.
C. Mementos (or mementoes): (a souvenir); an object that you keep to remember a person, place, or event.
D. Ablutions: noun: the act of washing yourself.