[Q]: Which of the following solutions is better for the following goal:
How to lock a bathroom door.

[A]: Close the door. Find the locking mechanism like a knob or lever, and twist it either clockwise or counter-clockwise until the lock is engaged. Try to open the door to see if it's properly locked.

[Q]: Which of the following solutions is better for the following goal:
cheese cloth

[A]: can be used to sift powdered sugar

[Q]: Which of the following solutions is better for the following goal:
How many eggs do I need to make pancakes?

[A]: To make pancakes for 4 people, you will need 3 eggs

[Q]: Which of the following solutions is better for the following goal:
How can you conserve your phone battery and make a low battery last longer?

[A]:
Put the phone in airplane mode, this will conserve power, turning it off and on wastes more battery than setting it in airplane mode.