Goal and options: Prevent green fingers from wearing rings.

OPTIONS:
- Coat inside of ring with clear nail polish.
- Coat outside of ring with clear nail polish.
output answer: Coat inside of ring with clear nail polish.

Goal and options: Open a modern quartz movement watch to replace the battery.

OPTIONS:
- Place the watch face down on a soft surface. Look to see the back is a screw on or a push on. Unscrew a screw on with the appropriate tool. Use a small screw driver to pry the push on type off. Put the new battery in place and reassemble.
- Place the watch face down on a soft surface. Look to see the back is a screw on or a push on. Unscrew a screw on with the appropriate tool. Use a finger nail to pry the push on type off. Put the new battery in place and reassemble.
output answer: Place the watch face down on a soft surface. Look to see the back is a screw on or a push on. Unscrew a screw on with the appropriate tool. Use a small screw driver to pry the push on type off. Put the new battery in place and reassemble.

Goal and options: To prevent a light leak in a homemade camera, you can

OPTIONS:
- Paint the insides black
- Paint the insides white
output answer:
Paint the insides black