The king and duke were merely con-men pretending to be royalty. They met in Huck's raft because they were running away from the authorities who discovered their con.
They were initially strangers but upon knowing that each was a conman. Both hatched a plan to con numerous people by staging a play like Romeo and Juliet.
Answer:
I would think that this means that he can use his happiness to hide his true face and emotions. He can put the mask on and appear happy to others, when really he is not. This acts like a mask because a mask makes your face look like something it isn't. Like on Halloween when you dress up, wearing a mask makes you look like what you desire to look like, not what you really are.
"<span>c. I sat between him and her during the sales conference" would be the only sentence that uses pronouns correctly, but it would be much more common to substitute "them" for "him and her". </span>