We can infer from the second paragraph that______.
A, young people lack experience and wisdom
B. American older people often joke about their old age
C. American culture is very young
D. different countries have different opinions on old age

A．American culture is very young
B．different countries have different opinions on old age
C．American older people often joke about their old age
D．We can infer from the second paragraph that______.
E．A, young people lack experience and wisdom