The correct answer is: C. monochrome
A media query is a CSS rule that specifies how a page should be displayed depending on the user’s device or environment. The monochrome media query is used to target devices that have a monochrome display. The monochrome media query can be used to specify the number of bits that are used for grayscale display.
The gray media query is used to target devices that have a grayscale display. The gray media query cannot be used to specify the number of bits that are used for grayscale display.
The chrome media query is used to target devices that have a Chrome browser. The chrome media query cannot be used to specify the number of bits that are used for grayscale display.
None of the other options are valid media queries.