[Q]: Which of the following solutions is better for the following goal:
Heal skin irritation.

[A]: Soak an egg shell in apple cider vinegar for a few days.

[Q]: Which of the following solutions is better for the following goal:
Where do I sit so I get the best sound in a movie theatre?

[A]: Count the seats, sit 2/3 of the way back at the very center of the theatre because this is where the sound engineer sits to perfect the acoustics.

[Q]: Which of the following solutions is better for the following goal:
How can I freshen my breath if I forgot to brush my teeth at home?

[A]: If you left home and forgot to brush your teeth or you ran out of toothpaste, chewing an apple with it's skin on can help with bad breath.

[Q]: Which of the following solutions is better for the following goal:
How can I remove old finish and dirt from wood?

[A]:
Use a belt sander or rough sandpaper to clean off wood.