A、He won’t come to dinner. B、He may come after finishing his work. C、He doesn’t enjoy the seafood. D、He might join them if Mary

W: I made a big mistake today. I read a student’s article to the class and pointed his errors out. I meant the whole class to learn from his article. Then I saw he was lowering his head and I realized he was hurt.
M: It is the teacher’s responsibility to point out students’ errors but not in public. For some of the students have a strong sense of self-respect.
Q: What are they mainly talking about?

W: Come over and have dinner with us this Friday. Let’s enjoy the seafood we brought back from the beautiful seaside town we traveled to last week.
M: Oh, I might be occupied this Friday night. But is Mary invited, too?
Q: What does the man mean?