Which of the following statements is not true about British pub etiquette?

Which of the following statements is not true about British pub etiquette?
A.It is rude to start up a conversation with someone sitting at a table.
B.You can shout“service” or wave money about to attract the attention of the barmen.
C.You don’t have to tip bar staff in pubs.
D.If you go to a pub with a group of people, usually one or two representatives will go and get the drink, not the whole group.
正确答案：You can shout“service” or wave money about to attract the attention of the barmen.