What Cultural Differences or Similarities Were Found in the Research

What cultural differences or similarities were found in the research on pedestrian interaction in the U.S.and Japan?

A) Both cultures tended to look back at someone who looked at them.
B) Japanese were more likely to greet the research confederate who greeted them.
C) Both Japanese and Americans did not smile back when the confederates smiled at them.
D) Both Japanese and Americans failed to respond to the confederates.