in thE Author's opinion, "CulturE shoCk" is ______.
A．thE proDuCt oF somE FuturE soCiEty
B．thE EFFECt oF A nEw CulturE on An unprEpArED visitor
C．A tErm inComprEhEnsivE in thE populAr voCABulAry
D．A sErious soCiAl mAlADy in thE FAst ChAnging soCiEty