The answer is Letter D - Irony.
Foreshadowing: hint of what is to come later in the story; Allusion: makes reference to something or someone else; Hyperbole: an exaggeration (it's not a hyperbole since Pip's belief is not true); Irony: a contrast between what is said and what is meant - Pip's statement is an irony because Biddy has not done him wrong at all, in fact, it's the other way around.