【单选题】

Social customs and ways of behaving change. Things which were considered impolite many years ago are now acceptable. Just a few years ago, it was considered impolite behaviour for a man to smoke on the street. No man who thought of himself as being a gentleman would make a fool of himself by smoking when a lady was in a room.

Customs are also different from country to country.Does a man walk on the left or the right of a woman in your country Or doesn’t it matter What about table manner Should you use both hands when you are eating
TheAmericans and theBritish not only speak the same language but also share a large number of social customs. For example, in bothAmerica andEngland people shake hands when they meet each other for the first time.Also, mostEnglishmen will open a door for a woman or offer their seat to a woman, and so will mostAmericans. Promptness is important both inEngland and inAmericA、That is, if a dinner invitation is for 7 o’clock, the dinner guest either arrives close to that time or calls up to explain his delay.
The important thing to remember about social customs is not to do anything that might make other people feel uncomfortable -- especially if they are your guests. There is an old story about a man who gave a dinner party. When the food was served, one of the guests started to eat his peas with a knife. The other guests were amused or shocked, hut the host calmly picked up his knife and began eating in the same way. It would have been bad manners to make his guest feel foolish or uncomfortable.
"Bad manners" in the last sentence means ______.
A、ugly
B、dishonestC、impolite
D、shameful