Within the Parable of the Good Samaritan (Luke 10:25-37), what theological concept is primarily illustrated by the Samaritan's actions?

A Justification by works, demonstrating that salvation is earned through charitable deeds. B The importance of adhering to strict religious laws and traditions, as exemplified by the priest and Levite. C The universal call to compassion and love for one's neighbor, irrespective of social or ethnic boundaries. D The superiority of Samaritan religious practices over those of the Jewish people.