Finish the following sentence with the best choice: How to ensure that the seesaw is well balanced?

Choices:
- If the weight on the one side of the seesaw is equal to the plank itself, then one can conclude that the seesaw is balanced.
- If the weight on the either side of the seesaw is equal, then one can conclude that the seesaw is balanced.

Answer:
If the weight on the either side of the seesaw is equal, then one can conclude that the seesaw is balanced.