What determines CNATRA separation for successive touch and goes?

The correct choice revolves around the fact that the determination of CNATRA separation for successive touch and goes is primarily influenced by the status of the preceding aircraft. When an aircraft that has just completed a touch and go is still airborne, it sets the necessary spacing for the subsequent aircraft preparing to perform a touch and go. This is crucial for maintaining safety and order within the flight operations.

The other factors listed, such as wind conditions, aircraft type, and the presence of a flight instructor, do play roles in flight operations and can influence various aspects of training procedures. However, they do not directly dictate the separation requirements for successive touch and goes as effectively as knowing the status of the preceding aircraft does. The focus on airborne status ensures that there is adequate distance and timing to manage the operations without risk of collision or interference during the landing and takeoff process.