Final answer:
For winding hair on perm rods, the right technique is to use one end paper under and one above the base panel, extending past the hair ends to protect them during the perm process.
Step-by-step explanation:
When winding hair on perm rods, it is critical to follow a proper technique to ensure even curls and to prevent hair damage.
The correct method is described in option C: "place one end paper under the base panel and one above the base panel so that the papers extend past the ends of the hair."
This ensures that the hair is fully wrapped and protected when chemicals are applied during the perming process. Using only one end paper under the hair might not sufficiently protect the ends, while using too many papers or folding them incorrectly could result in uneven processing or curls.