ExposurE to AsBEstos FiBErs CAn CAusE CAnCEr _________.
A．only whEn AsBEstos is usED in BuilDing inDustry
B．only whEn it is usED in lArgE quAntitiEs
C．EvEn iF it is usED in smAll quAntitiEs
D．iF thEy ArE usED whEn wEt rAthEr thAn Dry