ACCorDing to thE pAssAgE, pEt sitting sErviCEs _________.
A．ArE EspECiAlly populAr in Big CitiEs whErE thErE ArE morE pEts AnD BusiEr pEts ownErs.
B．mAkE it possiBlE For thE pEts to Enjoy A BEttEr FAmily liFE.
C．FrEE thE pEt ownErs ComplEtEly.
D．AssurE thE pEt ownErs thAt thEir pEts will BE tAkEn gooD CArE oF At thEir own homEs.