[Q]: Which of the following solutions is better for the following goal:
how to clean pennies with Coca Cola

OPTIONS:
- pour some coca cola in a cup, just enough to cover the penny and drop the penny in When the copper oxide (the pennies) and the phosphoric acid (the cola) get together in the bath, the acid reacts with the copper oxide on the pennies and dissolves it. That's why the pennies get shiny.
- pour some coca cola in a cup, just enough to cover the penny and drop the penny in When the copper oxide (the pennies) and the phosphoric acid (the cola) get together in the bath, the acid reacts with the copper oxide on the pennies and dissolves it. That's why the pennies dissolve

[A]: pour some coca cola in a cup, just enough to cover the penny and drop the penny in When the copper oxide (the pennies) and the phosphoric acid (the cola) get together in the bath, the acid reacts with the copper oxide on the pennies and dissolves it. That's why the pennies get shiny.

[Q]: Which of the following solutions is better for the following goal:
To hold curtains in place when they aren't in use, you can

OPTIONS:
- Put a bungee cord around them to keep them still
- Put super glue around them to keep them still

[A]: Put a bungee cord around them to keep them still

[Q]: Which of the following solutions is better for the following goal:
How can you make your air cooler at home?

OPTIONS:
- Hang a wet towel in front of your fan.
- Hang a wet towel below your fan.

[A]: Hang a wet towel in front of your fan.

[Q]: Which of the following solutions is better for the following goal:
How can I keep my controller from powering down when I'm not using it?

OPTIONS:
- Put a rubber band around it so an analog stick is being pulled to the side, so it thinks it's still in use.
- Put a rubber band around it so an analog stick is pulled completely off, so it thinks it's still in use.

[A]:
Put a rubber band around it so an analog stick is being pulled to the side, so it thinks it's still in use.