human
Question: Which pair of items will repel each other?

Choices:
A) a positively-charged wool sock and a neutral plastic bag
B) a neutral cotton sweater and a negatively-charged plastic pellet
C) a negatively-charged balloon and a positively-charged piece of paper
D) a negatively-charged plastic strip and a negatively-charged piece of cloth
gpt
The correct answer is 3: a negatively-charged plastic strip and a negatively-charged piece of cloth.