Question:
Goal: vinegar

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Can remove Mold

Question:
Goal: How to remove rough edges from wood?

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Once the wood is sawed and chopped to specification, sand the wood down with good quality high grit sand paper

Question:
Goal: To take a screenshot on Samsung phone.

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Press the power button and the down volume keys simultaneously