ChoosE thE CorrECt lEttEr FromA-
D、AnD writE it in BoxEs on yourAnswEr shEEt.
thE tourism inDustry CAnnot survivE unlEss it
A、promotEs ECologiCAlly-sustAinABlE ACtivitiEs.
B、EnsurEs thAt ECo-tourism opErAtors ArE gEnuinE.
C、ConsiDErs thE long-tErm EFFECts oF tourism on physiCAl rEsourCEs.
D、All oF thE ABovE.