Goal and options: Take back sent email.

OPTIONS:
- Enable "undo send" in Gmail labs.
- Disable "undo send" in Gmail labs.
output answer: Enable "undo send" in Gmail labs.

Goal and options: Use the freezer for keeping milk

OPTIONS:
- Place the milk in your freezer in its original plastic container or glass freezer-safe container. Make sure to make the lid of the milk very tight to allow the milk to expand, so remove some milk if needed. When you're ready to use the frozen milk, allow it to thaw in the fridge.
- Place the milk in your freezer in its original plastic container or glass freezer-safe container. Make sure to leave room to allow the milk to expand, so remove some milk if needed. When you're ready to use the frozen milk, allow it to thaw in the fridge.
output answer: Place the milk in your freezer in its original plastic container or glass freezer-safe container. Make sure to leave room to allow the milk to expand, so remove some milk if needed. When you're ready to use the frozen milk, allow it to thaw in the fridge.

Goal and options: Add extra space for bath towels.

OPTIONS:
- Install S-hooks onto shower curtain rod.
- Install S-hooks onto shower head.
output answer:
Install S-hooks onto shower curtain rod.