What is the meaning of the word altruism in the sentence below?

"At the core of Confucianist Saw are altruism and humaneness let go beyond the religion."
A. The selfless concern for one's own family and friends.
B. The southwest concerned for animals and plants.
C. The selfless concern for the well-being of others.
D. The selfish concern for one's own well-being.

C. The selfless concern for the well-being of others.