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A frozen yogurt shop offers a rewards system for frequent customers. The graph below represents how much a rewards customer pays based on the number of ounces of frozen yogurt purchased.

Which statement describes the total amount a rewards customer pays for 10 ounces and 12 ounces of yogurt?

A.) A rewards customer earns 2 free ounces of yogurt because the total amount paid for 10 ounces and 12 ounces is the same.

B.) A rewards customer pays $5 per ounce because the total amount paid is always increasing.

C.) A rewards customer pays $20 for 10 or 12 ounces of yogurt because the total amount paid is increasing.

D.) A rewards customer earns 5 free ounces of yogurt because the total amount paid for 10 ounces and 12 ounces is the same.