Ted Works in His Family's Bakery Business

Ted works in his family's bakery business. They supply bread and rolls to neighboring restaurants, and have their own store-front where they sell breads, rolls, pastries, cookies, and cupcakes. Ted thinks he should put free Wi-Fi in the store front (which seats about 15 people) . This idea reflects which one of Porter's five competitive forces?

A) threat of entry of new competitors
B) bargaining power of suppliers
C) bargaining power of customers
D) threat of substitute products
E) rivalry among existing firms in an industry