问题: ______
A: dvertisementsinmagazinesandontelevisionreachmanypeople,too.
B:nadforaplay,orsomeotherperformancewaspaintedonpartofabuildingoronawallaroundacity.
C:utonlyafewpeoplerealizethiswasanearlyformofadvertising.
D:Ifyouusepublictransportation,youwillseelargeprintedads,calledcarcards,onbusesandtaxisandintrain.
E:dvertisementscanbeseeneverywhere.
F:Radiocommercialsalsoprovidethiskindofinformation.