【单选题】
·you will hEAr A rADio intErviEw with mArthA FlowErs, thE mAnAgingDirECtor oF thE mAx ChAin oF sAnDwiCh BArs.
·For EACh quEstion (23-30), mArk onE lEttErA,B、orC、For thE CorrECt AnswEr.
·AFtEr you hAvE listEnED onCE, rEplAy thE rECorDing.
ACCorDing to mArthA, whAt is thE most importAnt FACtor in mAx’s suCCEssA、thE sAmE CustomErs kEEp Buying thEir proDuCts. B、thEy only sEll thE BEst quAlity proDuCts. C、thEy EArn high proFit.