Traditionally, which of the following can represent the most important among all sorts of family ties?

A.The father should be kind and the son filial.

B.A perfectly matched couple come from families of equal economic and social status.

C.Filial piety is the most important among all virtues.

D.People return to their roots before the end of life.

正确答案：The father should be kind and the son filial.；Filial piety is the most important among all virtues.