Which of the following is not a requirement for basic VFR operation in Class D airspace?

In Class D airspace, basic Visual Flight Rules (VFR) operations require specific visibility standards. The correct choice highlights that having a visibility of at least 1 mile is not sufficient; rather, the regulations mandate a minimum visibility of at least 3 miles. This is necessary for pilots to maintain safe visual separation from other aircraft and the ground, especially in more congested airspaces like Class D.

Additionally, the requirements stipulate that the ceiling must be at least 1,000 feet above ground level, which provides enough vertical space for pilots to navigate safely. The regulation also requires that pilots must be clear of clouds to maintain visual reference to the ground and other aircraft. Therefore, meeting the higher visibility requirement of 3 miles instead of just 1 mile ensures enhanced safety and situational awareness during operations in this type of airspace.