Final answer:
The choice of leadership styles is a managerial planning decision that can be influenced by culture.
Step-by-step explanation:
An example of a managerial planning decision that is influenced by culture is the choice of leadership styles (option d). Different cultures may have different expectations and preferences when it comes to leadership styles, such as autocratic, democratic, or laissez-faire leadership. For example, in some cultures, a hierarchical and authoritative leadership style may be favored, while in others, a more collaborative and participative style may be preferred.