Tertiary colors are made by mixing primary and secondary colors. The best option from the list provided is Red and Orange, which creates Red-Orange, a tertiary color. Other combinations either produce secondary colors or do not qualify as tertiary colors. ;
The combination that creates a tertiary color is Red and Orange, resulting in red-orange. Other combinations either produce secondary colors or do not fit the definition of tertiary colors. Therefore, the correct answer is C. Red and Orange.
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