How do macbeth and lady macbeth plan to murder the king? a. macbeth will invite the king for a tour of the castle and then stab him to death in an isolated location. b. lady macbeth will poison the king's wine, causing him to die in his bed, where macbeth will find him in the morning. c. lady macbeth will drug the king's guards, allowing macbeth to sneak in and stab the king to death with a guard's dagger. d. lady macbeth will poison the guards and kill the king herself while macbeth establishes an alibi with banquo.