The correct answer is: C. @import
The @import rule allows users to import style rules from other style sheets. It is used to include the contents of another style sheet into the current style sheet. The @import rule can be used to import style sheets from any location on the web, including local files and remote files.
The @media rule is used to specify different style sheets for different media types. For example, you could use the @media rule to specify a different style sheet for print media than for screen media.
The @important rule is used to override the style rules of other style sheets. The @important rule can be used to specify that a particular style rule should be applied, even if there are other style rules that would override it.
The @style rule is used to define inline styles. Inline styles are styles that are defined directly in the HTML code. Inline styles are not as commonly used as external style sheets, but they can be useful for quickly adding styles to a particular element.