Considering the historical and cultural context of Jesus' audience, what is the most significant element of offense in the Parable of the Good Samaritan (Luke 10:25-37)?

A The Samaritan helped a Jewish man. B The priest and Levite were too busy to help. C Samaritans were considered religiously and ethnically impure by Jews, making the Samaritan's compassion particularly shocking. D The Jewish man was traveling alone on a dangerous road.