In England when people who do not know each other meet in the street, they usually greet each other politely. Which situation fits the western custom?
A. a. What a nice day, isn’t it?
b. Yes, it is.
B. a. Hi, John. Have you had your lunch?
b. Hi, Mike. Not yet. What about you?
C.a. Hello, what is your plan for your summer vacation?
b. Hello, I have no idea.