[Q]: Which of the following solutions is better for the following goal:
To detect the potential difference between two points

[A]: Put one probe of a digital multimeter on one point and the other probe on another point

[Q]: Which of the following solutions is better for the following goal:
how do you administer a shot?

[A]: poke the needle into the skin and press down on the syringe.

[Q]: Which of the following solutions is better for the following goal:
To hold curtains in place when they aren't in use, you can

[A]: Put a bungee cord around them to keep them still

[Q]: Which of the following solutions is better for the following goal:
How do you remove permanent marker from wood furniture?

[A]:
Soak old rag in rubbing alcohol and rub on the marker.