According to the Definition Given in Your Book, Which of the Following

According to the definition given in your book, which of the following situations would be classified as interpersonal communication?

A) The usher at the theatre looks at your tickets then points to the center aisle.
B) You and your roommate are discussing a movie you just watched.
C) You call the weather line to find out the forecast.
D) You present your project to your history class.