Which of the following describes the minimum distance from clouds for aircraft flying under VFR in Class D airspace?

When flying under Visual Flight Rules (VFR) in Class D airspace, the requirement to remain clear of clouds is crucial for ensuring flight safety and maintaining visual reference during operation. This regulation serves to prevent collisions with other aircraft and obstacles that may be obscured by cloud cover.

In Class D airspace, pilots are expected to maintain adequate visual conditions, which includes not just staying clear of clouds but also having a clear view of the ground and other aircraft. Remaining clear of clouds effectively ensures that pilots can maintain visual separation from other traffic and have sufficient visual references to navigate safely.

The other options outlined specific distances to maintain from clouds, but they do not encompass the broader requirement of remaining completely clear of clouds. While regulations vary based on specific circumstances and airspace classifications, the fundamental rule under VFR in Class D emphasizes the necessity of a clear visual horizon, making staying clear of clouds a vital requirement for safe flight operations.