Two mobile phone service providers, XcelNet and TeleConnect, are the only companies operating in a small city. They both offer similar services and have a significant share of the local market. They are aware of each other's presence and make production decisions based on their competitor's output. In the given scenario, what market structure and model best represent the interaction between XcelNet and TeleConnect? Group of answer choices Perfect competition and Bertrand competition Monopoly and price discrimination Oligopoly and Cournot competition Monopsony and Stackelberg competition