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Which of the following is the best example of investment as defined by economists?
12-volt Batteries
Rechargeable electrical storage devices commonly used in vehicles and various electronic systems, providing 12 volts of direct current.
Alessandro Volta
An Italian physicist known for the invention of the voltaic pile, considered one of the first electrical batteries.
Pure Sulfuric Acid
Sulfuric acid with no impurities, highly corrosive and typically used industrially in concentrated form for chemical synthesis or processing.
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