Which Hypothesis Was Confirmed by a Study That Involved 2,893

Which hypothesis was confirmed by a study that involved 2,893 East and West German participants?

A) the East Germans had more opportunities to have foreign friends,so their prejudice levels remained relatively low.
B) the East Germans had fewer opportunities to have foreign friends,so their prejudice levels remained relatively high.
C) the West Germans had fewer opportunities to have foreign friends,so their prejudice levels remained relatively high.
D) regardless of the opportunities for having foreign friends,both the East and the West Germans exhibited high levels of prejudice.