A、Because they had driven for a long time. B、Because they had booked for another time. C、Because they had planned to have their

M: Good evening, Madam. What can I do for you?
W: The name is McDonald. We’ve booked two double rooms for a week.
M: Let me see. I’m afraid there’s been a mistake, Madam. Look, you’ve booked for next week.
W: Oh, Lord. I shouldn’t have let my mom do the booking for us. Haven’t you any room free at all?
M: At this time of the year? In August, Madam? I’m terribly sorry, but the whole town’s booked out. I’m afraid you won’t find a room anywhere.
W: Not even a bed and breakfast place?
M: You might possibly find a farm if you went inland.
W: We want to be by the sea because of the children. They especially like to build sand-castles.
M: Then I don’t know what to suggest. There’s a caravan park two miles along the coast. But I’m sure it’s full. Or there’s a Butlan’s holiday camp.
W: No, thank you. We want some peace and quiet. Is there anywhere we can get a meal? We want to have our supper.
M. At this hour, it’s already night o’clock. You could try the next town. The restaurants will be closed, but there are one or two snack bars.
W: We’ve been twelve hours on the road. There were queues five miles long in places. The children are dead tired.
M:  Well, I’m sure we can do something for the children. They can sleep on the sofas in the lounge. But I’m afraid, I can’t help you and your husband.
W: Oh, don’t worry about us. We can sleep in the car. Cheer up dear. The drive home won’t be so bad. There won’t be nearly so much traffic going back to London.