By a comparison between past problems and present ones the author draws attention to the ______.

A．in some societies, people's behaviors are not governed by cultural codes
B．there are still societies whose cultural codes still remain a mystery to us
C．once people accept a cultural code, they' 11 have a full understanding of their behavior
D．the Open and Closed Mind exerts great impact on people' s behavior

A．The grammatical rules in the language used by the largest population in a culture.
B．Rules in a culture that can be modeled on by another culture.
C．Any rules that people in a culture receive throughout his lifetime.
D．Rules and codes that shape one's cultural perspective and behavior.