Social customs and ways of behaving are changing.（ 1 ） was considered impolite many years ago is now acceptable. Just a few years ago, it was thought to be impolite behavior for a man to smoke in the street. No man who thought of himself as being a gentleman （ 2 ） a fool of himself by smoking when a woman was in the room. Customs （ 3 ） from country to country, but the important thing （ 4 ） is not to do anything that might make other people feel（ 5 ） to keep them from feeling foolish, especially if they are your guests. You are expected to find a way. 根据短文内容，在A、B、C、D、E五个选项中，选出最佳答案填入文中【1】处。（）
A uncomfortable B would make C to remember D what E vary