<human>: Which of the following solutions is better for the following goal:
Boil water in ground.

OPTIONS:
- Dig hole, line hole with foil and fill with water, heat up rocks with fire then throw rocks in hole.
- Dig hole, line hole with newspaper and fill with water, heat up rocks with fire then throw rocks in hole.
<bot>: Dig hole, line hole with foil and fill with water, heat up rocks with fire then throw rocks in hole.