Finish the following sentence with the best choice: How do I make raspberry bark harden after I've put together all the ingredients?

Choices:
- Move the silicone mat with the bark in the fridge for a few hours until the bark is hard
- Move the silicone mat with the bark in the microwave for a few hours until the bark is hard

Answer:
Move the silicone mat with the bark in the fridge for a few hours until the bark is hard