Question:
Goal: To quickly find nails and studs below a wall,

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
use a magnet to locate where the metal is at.

Question:
Goal: cages

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
to store dogs in your house

Question:
Goal: Prevent mold on bathroom ceilings.

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Keep door open during hot showers.