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

[A]: soak into a net

[Q]: Which of the following solutions is better for the following goal:
How can I make a neat trash bag dispenser?

[A]: Cut an "X" from corner to corner in the bottom of a clean plastic milk container. Push the roll of trash bags into the container, thread the first bag out through the spout, and let the roll fall back into the container. Pull the bags out of the spout as you need them. Wrap the bag ties around the handle of the container.

[Q]: Which of the following solutions is better for the following goal:
To get homemade quantum dots to glow,

[A]: you need to dilute the concentrated solution of quantum dots. Quantum dots only glow at certain concentrations, so you need to pipette small amounts to a half filled vial of water and test different amount. Once you have your different vials, expose them to an ultraviolet light to see which concentration of quantum dots glow. Congrats, you have a homemade quantum dot solution.

[Q]: Which of the following solutions is better for the following goal:
What kids of metal can you recycle?

[A]:
Metals. - Tin, aluminum, and steel cans.