Finish the following sentence with the best choice: To line the square muffin pan with parchment paper so that paper can line the pan exactly.

Choices:
- Measure the depth and side of the inside of the squares. Cut the parchment paper into squares with the length equivalent to 2 depths plus 1 side. Fold it up at the length of the depth on all 4 sides. Cut away the overlaps at the corners.
- Measure the depth and side of the outside of the squares. Cut the parchment paper into squares with the length equivalent to 2 depths plus 1 side. Fold it up at the length of the depth on all 4 sides. Cut away the overlaps at the corners.

Answer:
Measure the depth and side of the inside of the squares. Cut the parchment paper into squares with the length equivalent to 2 depths plus 1 side. Fold it up at the length of the depth on all 4 sides. Cut away the overlaps at the corners.