The correct answer is: A. background-color
The background-color property is used to set the background color of an element. It can be used to set a solid color, a gradient, or an image.
The background-image property is used to set a background image for an element. The image can be repeated, positioned, and scaled.
The background-repeat property is used to control how the background image is repeated. The possible values are repeat, repeat-x, repeat-y, and no-repeat.
The background-position property is used to control the position of the background image. The possible values are top, bottom, left, right, center, and center-center.
Here is an example of how to use the background-color property to set a solid color background for an element:
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Here is an example of how to use the background-image property to set a background image for an element:
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Here is an example of how to use the background-repeat property to repeat the background image:
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Here is an example of how to use the background-position property to position the background image:
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