{{B}}quEstions 16 to 20 ArE BAsED on thE Following tAlk.{{/B}}

A、A、vAst numBEr oF lABorErs migrAting to inDustriAlizED CountriEs.
B、morE joB-hopping in thE lABor mArkEt thAn EvEr BEForE.
C、A、shiFt From mAnuFACturing to tErtiAry inDustry.
D、joBs in sErviCE inDustriEs morE intErEsting AnD BEttEr pAiD、