Answer:
C) plastic
Explanation:
We know that like charges repel each other and unlike charges attract each other. When plastic ball is rubbed with fur, it could attract a positively charged pith ball. This means that the plastic ball gained electrons from the fur and became negatively charged.
When a glass rod is rubbed with fur, it could repel the same positively charged pith ball. This means glass rod lost electrons to the fur and became positively charged.
From this, we can conclude that most likely plastic could readily gain electrons.
c)
From the first observation, we can infer that the plastic ball has become negatively charged (it attracted a positively charged pith ball). From the second observation, we can infer that the glass rod became positively charged (it repelled the positively charged pith ball). This also implies that plastic will become more negatively charged than a glass rod if both are rubbed together. In other words, plastic gains electrons more readily
