A、They are the same person. B、They are friends of the speakers. C、They are psychology professors. D、They are fictional character

M: Hi Tracy! What do you think of our class on children’s literature?
W: It looks pretty good. I was surprised to see you in there. [12]Are you also majoring in elementary education?  
M: No, I’m not. But as a psychology major I can use this to fulfill the requirement in developmental psychology.  
W: [13]Have you finished the first assignment yet?  
M: Not yet. I just bought the books yesterday. How about you?
W: I started it this afternoon. [13]It’s great fun reading those wonderful children’s stories by Dr. Seuss.  
M: Dr. Seuss? I don’t remember seeing his name on the reading list.  
W: [14]His full name is Theodor Seuss Geisel. That’s how he’s listed in the biography. Dr. Seuss is his pen name.  
M: I loved reading those stories when I was a child. It’ll be interesting to read them now from a different perspective. I guess they’ll give me a good idea of how children think.  
W: [15]Those stories are also great for classroom use.  
M: How’s that?  
W: Well, take a typical Dr. Seuss book like The Cat in the Hat It has a controlled vocabulary of only 200 words.
M: [15]So that means the children get lots of practice using a small number of words over and over.
W: Exactly. In fact The Cat in the Hat was written primarily to show how a controlled vocabulary reader could also be interesting and fun.  
M: Well. It sounds as though this course is also going to be interesting and fun. I’ll get started on those readings tonight.
12.What is Tracy’s major field of study?
13.Why will the speakers be reading children’s books?
14.Who are Dr. Seuss and Theodor Geisel?
15.What can we learn about the book The Cat in the Hat?