单项选择题

M: Are you looking forward to your trip to Canada, Julie
W: I can’t wait to see Canada, Jack. We can’t agree on how to make the journey. My husband insists on flying, but I want to sail. Planes make me nervous.
M: There is nothing to be frightened of. How many planes fly across the Atlantic everyday
W: I have no idea. Hundreds, I suppose.
M: And how often do you hear of a plane crash Once or twice a year
W: Yes, but planes fly so high and so fast that once would be enough.
M: Look, there are more people killed in road accidents every day than in air crashes every year.
W: I’d still prefer to go by sea. Ships may not travel fast but at least you can relax.
M: It’s fine if you’re a good sailor, but have you ever traveled far in a rough sea
W: No, I’ve only been in a boat once. I sailed down the River Thames for sightseeing, but I’d rather be seasick than dead.

According to the dialogue, which one is true()

A. Ships are slow.
B. Ships are fast.
C. Ships are expensive.