What is the example of a porcelain jar in the 8th paragraph used to prove?

A.Beautiful appearance is very important to one’s health.

B.For a woman, her real beauty usually lies in her inner spiritual contents only.

C.The standard of judging the quality of a jar is also true for a woman’s beauty.

D.Real beauty is the good combination of the outer appearance and the inner heart.

正确答案：Real beauty is the good combination of the outer appearance and the inner heart.