A pErson in BEijing CAn DEsCriBE whAt hAppEns in AustrAliA; similArly, A 21st-CEntury pErson CAn tAlk ABout EvEnts in AnCiEnt timEs. this DEmonstrAtEs thAt lAnguAgE possEssEs thE DEsign FEAturE oF ______.
A．DisplACEmEnt
B．DuAlity
C．CulturAl trAnsmission
D．proDuCtivity