Many a time in life, you just need to take up all your courage and do something your heart tells you to, because it is worth ________.
A:that
B:it
C:much
D:well
中国人吃饭用筷子,韩国人用筷子吃菜、勺子吃饭;中国喜事都用红信封,而韩国人用白信封送礼;中国人送礼要厚礼,韩国人一双袜子也算是送礼……这反映了( )