<human>: Which of the following solutions is better for the following goal:
How can I open a letter so that no one will know I unsealed the envelope?

OPTIONS:
- Placing the letter in the microwave on low for 1 hour will unseal the glue on the envelope.
- Placing the letter in the refrigerator for 1 hour will unseal the glue on the envelope.
<bot>: Placing the letter in the refrigerator for 1 hour will unseal the glue on the envelope.