Excerpt from act iii, scene iii of shakespeare's  hamletpolonius.  [speaking to king claudius]  my lord, he's (hamlet's) going to his mother's (gertrude's) closet.  behind the arras i'll convey myself  to hear the process. i'll warrant she'll tax him home;   and, as you said, and wisely was it said, 2310'tis meet that some more audience than a mother,  since nature makes them partial, should o'erhear  the speech, of vantage. fare you well, my liege.  i'll call upon you ere you go to bed  and tell you what i know. why does polonius say that he will spy on hamlet's conversation with his mother? a)polonius believes that gertrude is plotting with ophelia against hamlet. b)polonius claims that gertrude will be too partial and forgiving to her own son. c)polonius wants to find out why the queen is so attracted to claudius. d)he wants to play a practical joke on hamlet.