A stakeholder is any person or group who has an interest in or influence over an organisation or project. Stakeholders can be classified into different categories based on their relationship with the organisation or project. One possible classification is the stakeholder wheel, which identifies six generic stakeholder categories: owner, partner, supplier, customer, regulator and competitor. Therefore, options A, B and C are correct answers, as they represent three stakeholder groups that are involved in the scenario. Owner refers to the person or group who owns or controls the organisation or project. In this case, it is the two people who each own 50% of AlpineTrails. Partner refers to the person or group who collaborates or cooperates with the organisation or project to achieve mutual benefits. In this case, it is WalkNation, who has agreed to work with AlpineTrails to provide special holidays for its members. Supplier refers to the person or group who provides goods or services to the organisation or project. In this case, it is the hotels, transport and equipment providers that AlpineTrails books for its customers. Option D is not a correct answer, as manager is not one of the generic stakeholder categories defined in the stakeholder wheel. Manager refers to the person or group who oversees or coordinates the activities of the organisation or project. In this case, it could be either one of the owners of AlpineTrails or someone appointed by them. Option E is not a correct answer, as competitor is not represented in this scenario. Competitor refers to the person or group who offers similar or alternative goods or services to the same market as the organisation or project. In this case, it could be another company that specialises in offering tailored walking holidays.