Read these lines spoken by Mercutio in Act III, Scene 1 after Tybalt stabs him and answer the question.

No, ‘tis not so deep as a well, nor so wide as a church-door; but ‘tis enough, ‘twill serve: ask for me to-morrow, and you shall find me a grave man.

Of what are these lines an example?
A. allusion
B. pun
C. monologue
D. soliloquy