Final answer:
Market trends are external factors that affect business strategies, not key considerations for determining a company's internal organizational structure, which includes company size, company culture, and legal regulations.
Step-by-step explanation:
Which of the following is not a key consideration in determining the most appropriate organizational structure? The correct answer is d) Market trends. When determining an organizational structure, key considerations typically include a) Company size, b) Company culture, and c) Legal regulations. These factors directly impact how a company should be organized internally. In contrast, market trends are external factors that influence business strategies rather than the internal organizational structure itself. While market trends can affect a company's operations, they do not determine the fundamental setup of an organization's hierarchy and the division of its internal roles and responsibilities.