C

Test question analysis: Everyone’s circle of friends is a specific cultural environment. It reflects your present and also foreshadows your future. In the future, this means that the cultural environment we live in will have an important impact on our development, because culture will affect people's practical activities and ways of thinking. C is in line with the meaning of the question; culture will affect people's communication behaviors, but it will not make decisions. Function, A is wrong; only excellent culture can enrich people's spiritual world and shape perfect personality, BD is wrong. The answer to this question is C.