What does the parable of the Good Samaritan (Luke 10:25-37) primarily teach about the concept of 'neighbor' in the New Testament?

A That one's neighbor is limited to those of the same ethnicity and religious background. B That one's neighbor is only those who live in close proximity. C That one's neighbor is anyone in need, regardless of their background or relationship to you. D That one's neighbor is primarily those who are wealthy and can offer reciprocal assistance.