What are the three phases that a spin will progress through as long as pro-spin controls are applied?

The correct choice, which outlines the three phases of a spin as long as pro-spin controls are applied, includes post-stall gyrations, incipient spin, and steady state spin.

Initially, when an aircraft enters a spin, it undergoes post-stall gyrations. This phase is characterized by rotational movements that occur after the stall but before a fully developed spin. It involves a loss of control and unpredictable behavior, with the aircraft experiencing some level of yawing and/or rolling motion.

Once these gyrations settle, the spin will transition into the incipient spin phase. This phase represents the point at which the aircraft begins to experience sustained yawing and rotating about its vertical axis. During this phase, the pilot may still have some control over the aircraft, and the characteristics of the spin can change depending on inputs.

Finally, if pro-spin controls continue, the aircraft reaches the steady state spin phase, where the spin rate stabilizes and the aircraft can maintain a predictable and constant rotational motion. In this phase, the rates of descent and rotation are consistent, but the aircraft is still uncontrollable and requires corrective actions for recovery.

The other options do not accurately portray the correct phases that result from maintaining pro-spin controls, which is why they do