Add the right suffix to pluralize the word 'Memento'

The correct suffix to pluralize the word "Memento" is Option C: __es.

Explanation

• The plural form of "Memento" is "Mementos" or "Mementoes".

• Therefore, adding the suffix __es creates the correct plural form "Mementoes".

• Other options like __ies, __ys, or __en do not form the standard plural of this word.