(07.03 MC)What idea did Confucius introduce to social relationships in ancient China?
A: the idea of filial piety, that children should respect and honor their parents and ancestors
B: the idea of yin and yang, that there are two totally opposite forces at work in social relations
C: the idea of ancestral descent, that firstborn male children are the most important family members
D: the idea of the Mandate of Heaven, that the gods would allow kings to be overthrown if they were corrupt