Finish the following sentence with the best choice: To make a frame inside a cake for filling.

Choices:
- Using a toothpick, make a frame inside the cake. Leave 1/2 inch at the edges. Do not cut through! Carve out the inside - about 1/2 inch deep. Save the cutout cake pieces in a bowl.
- Using a knife, make a frame inside the cake. Leave 1/2 inch at the edges. Do not cut through! Carve out the inside - about 1/2 inch deep. Save the cutout cake pieces in a bowl.

Answer:
Using a knife, make a frame inside the cake. Leave 1/2 inch at the edges. Do not cut through! Carve out the inside - about 1/2 inch deep. Save the cutout cake pieces in a bowl.