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If an object made of substance A rubs an object made of substance B, then A becomes positively charged and \( \mathrm{B} \) becomes negatively charged. If, however, an object made of substance A is rubbed
\( \mathrm{P} \) against an object made of substance \( \mathrm{C} \), then \( \mathrm{A} \) becomes negatively charged. What will happen if an

W object made of substance \( \mathrm{B} \) is rubbed against an object made of substance C?
(A) \( \mathrm{B} \) becomes positively charged and \( \mathrm{C} \) becomes positively charged.
(B) \( \mathrm{B} \) becomes positively charged and \( \mathrm{C} \) becomes negatively charged.
(C) \( \mathrm{B} \) becomes negatively charged and \( \mathrm{C} \) becomes positively charged.
(D) \( \mathrm{B} \) becomes negatively charged and \( \mathrm{C} \) becomes negatively charged.
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