Final answer:
Peter Drucker suggests asking three questions (What, Why, How) when creating a mission statement.
Step-by-step explanation:
The correct answer is a. What, Why, How. According to Peter Drucker, when creating a mission statement, we should ask ourselves three questions: What, Why, and How. These questions help to clarify the purpose, goals, and strategies of the organization. For example, 'What' refers to the products or services the organization will provide, 'Why' focuses on the reason or motivation behind the organization's existence, and 'How' relates to the methods or approaches used to achieve the organization's goals.