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In this case, using only one color plus black and white is an example of a Monochromatic Color Scheme. Let me break it down for you:
1. Monochromatic Color Scheme: This type of color scheme involves using variations in lightness and saturation of a single color. By adding black and white to the main color, different shades (by adding black) and tints (by adding white) of that color are created, resulting in a harmonious and unified color palette.
Therefore, the correct answer to the question is:
C. Monochromatic Color Scheme
I hope this explanation helps clarify the concept for you! If you have any more questions or need further assistance, feel free to ask.