Finish the following sentence with the best choice: How does one power a robotic claw attached to the arms?

Choices:
- An efficient way to do this would be installing batteries within the claw that can power it.
- If the cord to the claw is made long enough, it will be highly convenient for the wearer to plug the arm into a convenient socket as they see fit.

Answer:
An efficient way to do this would be installing batteries within the claw that can power it.