Finish the following sentence with the best choice: How to make a rabbit cage physically cozy for the rabbits?

Choices:
- Place the cages in properly air-conditioned rooms, with water-fountains inside the cages for the rabbits to quench their thirsts.
- Make sure the walls of the cage are nets for free air-flow, the placement of the cage isn't directly on the sun nor in the dark and to fill the inside of the cages with hay for cushion.

Answer:
Make sure the walls of the cage are nets for free air-flow, the placement of the cage isn't directly on the sun nor in the dark and to fill the inside of the cages with hay for cushion.