[单选题]

Parents and children often disagree about what is important or right because ______.
A． they have different styles of life
B． they hate each other
C． parents think that their children are troublemakers
D． they are in a society of rapidly changing social and moral values

Parents and children often disagree about what is important or right because ______.A． they have different styles of lifeB． they hate each otherC． parents think that their children are troublemakersD． they are in a society of rapidly changing social and moral values