Question:
Goal: How do you put a key on a key ring?

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Gently open the key ring with the edge of the key, sliding it in and around until in the center of the ring.

Question:
Goal: cheaply clean out your coffee maker

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
fill your coffee maker's reservoir with a few tablespoons of white vinegar mixed with water, run it, and run it once more with only water to ditch any lingering vinegar smell.

Question:
Goal: Make a plastic phone holder.

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Insert into old cassette case.