A、It has been snowing heavily for three days. B、Part of the line is covered with deep water. C、It is too foggy for the driver to

W: When are you going to get your hair cut? It’s not long till school starts again. I thought you were going to do it yesterday.
M: Well, I’ll have to go tomorrow or the next day. I couldn’t go yesterday. It was closed.
W: I thought it was always shut on Wednesday afternoons.
M: No, it’s shut all day Tuesday.
Question: On which day of the week are they having the conversation?

M: Um, excuse me. Did I just hear that the Preston to Lancaster service has been cancelled again?
W: Well, Sir, it won’t be running today.
M: Would that be because of the snow in the Tring Gap? You’ve had three days to get that line clear.
W: Well, actually, Sir, the snow melted earlier today and that part of the line’s a foot under water now. And if we did run any trains along there, we’d be having an accident and I’m sure that you wouldn’t...
Question: What is the cause of the train’s delay?