Answer:
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Answer:
B. Currency
Explanation:
Currency is money. It can vary in the types like ero in europe, dollars in america, and yen in japan.
Explanation:
This is because electrons requires energy to get excited. The energy required is very high. Thus insulators do not conduct electricity or insulators are insulators because of very large energy band gap between the valence band and conduction band.
The answer I believe is B. It is the most reasonable.