<human>: Which of the following solutions is better for the following goal:
How do you solder two coins together?

OPTIONS:
- Place coins where you would like them to be joined and apply glue to both sides in order to make them adhere to each other.  Cool down quickly with a water bottle.
- Place coins where you would like them to be joined and apply heat to both sides in order to make them adhere to each other.  Cool down quickly with a water bottle.
<bot>: Place coins where you would like them to be joined and apply heat to both sides in order to make them adhere to each other.  Cool down quickly with a water bottle.