39. Michael E. Porter提出的一般性競爭策略(Generic Competitive Strategies)，將有限的資源放在某一個特定的目標市場上，透過滿足該區隔的獨特需求來獲得優勢，此種策略為下列何者？ (A)差異化策略(Differentiation Strategy) (B)非差異化策略(Undifferentiated Strategy) (C)集中化策略(Focus Strategy) (D)客製化策略(Customization Strategy)