What are the cloud clearance requirements in D airspace?

In D airspace, the cloud clearance requirements dictate that pilots must maintain a specific visibility level and cloud separation to ensure safe operations. The correct requirements entail having a minimum of 3 statute miles visibility combined with the requirement to remain clear of clouds. This means that pilots do not need to be concerned about the specific distances from clouds, which contrasts with other airspace classifications that enforce more stringent separation rules based on the proximity to cloud formations.

The requirement for 3 statute miles in visibility ensures that pilots have adequate visual contact with the ground and other aircraft, which is essential for safe navigation. Being clear of clouds allows pilots to see and avoid any obstructions or other flying traffic, promoting greater safety in a shared airspace environment.

The other options either include additional distance requirements from clouds or less visibility than needed for D airspace, which do not align with the established regulations for this airspace classification. Thus, the correct choice effectively balances visibility with the necessity of remaining clear of clouds for pilot safety.