Macbeth

which of these lines provides important information for the resolution of the play?

o banquo, banquo! /our royal master's murder'd!

to crown my thoughts with acts, be it thought and done: /the castle of macduff i will surprise

hail, king, for so thou art: behold, where stands/the usurper's cursed head:

and, for an earnest of a greater honor,/he bade me, from him, call thee thane of cawdor