The correct answer is: C. mask-position-x
The mask-position CSS property specifies the position of the mask relative to the element. It takes two values: the x-coordinate and the y-coordinate. The x-coordinate specifies the horizontal position of the mask, and the y-coordinate specifies the vertical position of the mask.
The mask-x CSS property is not a valid CSS property.
The mask-x-origin CSS property specifies the origin of the mask relative to the element. It takes two values: the x-coordinate and the y-coordinate. The x-coordinate specifies the horizontal position of the origin, and the y-coordinate specifies the vertical position of the origin.
The mask-origin-x CSS property is not a valid CSS property.
Here is an example of how to use the mask-position CSS property:
css
.my-element {
width: 200px;
height: 200px;
background-color: blue;
mask-image: url("https://example.com/image.png");
mask-position: 0px 0px;
}
In this example, the mask will be positioned at the top left corner of the element.