Finish the following sentence with the best choice: To make a bedroom temperature colder without a fan or air conditioner,

Choices:
- hang up a thick, and dark blanket over the windows and then ensure their is proper air flow in the room.
- wave a large blanket up and down to generate a gust of wind to cool the room down when it gets too hot.

Answer:
hang up a thick, and dark blanket over the windows and then ensure their is proper air flow in the room.