What evidence from the text leads you to believe that the dagger macbeth sees is an illusion?   a."is this a dagger which i see before me, / the handle toward my hand? "  b."thou marshall'st me the way that i was going; / and such an instrument i was to use."  c."or art thou but / a dagger of the mind"  d."i see thee yet, in form as palpable / as this which now i draw."