A dual-axis chart shows monthly units sold (bar) and unit price (line). In March, units sold peaked at 500 while unit price was at its lowest ($40). In December, units sold = 200 at price $100. Which month had higher total revenue?
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A
March, because more units were sold
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B
December, because price was higher
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C
Both months had the same revenue
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D
March, because $40×500 = $20,000 vs December's $20,000