—Where is the tiger from?
—It from Asia.
A:comes
B:come
C:be
D:isn't
《史记集解》:“秦以前,民皆以金玉为印,龙虎钮,为其所好。秦以来,天子独以印称玺,又独以玉,群臣莫敢用。”该材料反映了( )