How does this passage add tension to the play? a. macbeth knows that lady macbeth thinks they should kill more people to hide their secret. b. the audience knows that lady macbeth is losing her mind and considering suicide before macbeth knows this information. c. the audience knows that lady macbeth is unhappy in her marriage before macbeth knows this information. d. macbeth knows that lady macbeth knows he has seen a ghost.