Finish the following sentence with the best choice: How to insert plastic triangles into brass rod.

Choices:
- Hold plastic rod with one hand and stick the hole from the plastic triangle into the rod. Keep doing this until all triangles are on the rod.
- Hold brass rod with one hand and stick the hole from the plastic triangle into the rod. Keep doing this until all triangles are on the rod.

Answer:
Hold brass rod with one hand and stick the hole from the plastic triangle into the rod. Keep doing this until all triangles are on the rod.