In act ii, scene iv, of macbeth, the audience hears reports of an owl killed by a falcon and of a horse eating another horse. what is the likely significance of these events? a)they signal banquo's and malcolm's impending doom. b)they highlight the disruption of the natural order caused by macbeth's crime. c)they symbolize the internal conflict in macbeth. d)they symbolize the conflict between macbeth and lady macbeth.