Hyperbole, you can't think of something a billion times a day.
Higgins is the one who says those words, and the correct answer is:
Higgins has seen the Hills outside the theater but does not yet remember.
Based on the sentences from ‘The Cask of Amontillado’, the
literary technique that is employed in the sentence is foreshadowing. This is a
way of having a writer or author give its reader an idea of what would likely
occur later on.