5. Andiswa runs a small flower shop. She recently attended a wedding expo where she met William. He is also a florist and has created an affordable cooling system that can be used in a normal passenger car and that makes it possible to transport flowers effectively in hot weather. Because of this invention, Andiswa has since been able to double the amount of deliveries she makes per week. This is an example of an efficient: a. Value chain b. Value-delivery network C. Marketing strategy d. Value-chain network