In order to answer the question: "which are the social tendencies that are general human characteristics" we have to emphasize on the study of

A．One's behavior is inborn so that nothing can be done about it.
B．One's behavior is instinctive so that he/she can't act differently.
C．One's behavior is taught from childhood so that it is fixed as normal in his/her childhood.
D．If one never changes his/her geographical dwelling, his/her social behavior can never be changed.

A．conditioned relations are acquired
B．relations to the organic and inorganic outer world are instinctive
C．relations among members of the same social group are learned
D．all of the above