Research on the Relation Between Culture and the Norm of Reciprocity

Research on the relation between culture and the norm of reciprocity has shown which of the following results?

A) Compared to people from collectivist cultures, people from individualist cultures are more influenced by the norm of reciprocity.
B) Compared to people from India, people from America regard social commitment as a moral imperative rather than a choice.
C) Compared to people from Canada, people from China are more likely to refuse gifts in order to avoid the pressure to return a favor later.
D) All of the above