Final answer:
The instructor should correct the student by suggesting to maintain power idle until the rotation completely stops, ensuring a safe recovery from the spin.
Step-by-step explanation:
When a pilot recovers from a spin, it is essential to follow specific procedures to regain control of the aircraft safely. The correct recovery actions typically are:
- Reducing throttle to idle to reduce lift and stop feeding the spin.
- Applying full opposite rudder to counteract the spin.
- Forward pressure on the control column to break the stall.
- Waiting until the rotation stops before doing anything else.
- Once the rotation has ceased, gradually pulling out of the dive and adding power as necessary.
Therefore, the instructor should correct the student's recovery procedure by advising to maintain the power idle until the rotation completely stops, which corresponds to option d in the given choices.