Which of the following statements are the benefits of a commonly used language?
选项：

A:A bridge language makes it possible to communicate with people from different cultures.;
B:Owing to the communication in one commonly used language, traditions and customs of different cultures are transmitted.;
C:Intercultural communication activities, such as, international business, academic conferences, and political visits, etc. are helpful to spread one certain culture to other places.;
D:because of the commonly used language, many local cultures disappear.