The correct answer is: A. @font-face
The @font-face rule is used to specify a font to be used in a web page. It can be used to specify a font that is installed on the user’s computer, or it can be used to specify a font that is downloaded from a server.
The @charset rule is used to specify the character encoding of a document.
The @media rule is used to specify different styles for different media types, such as screen, print, and speech.
The !important rule is used to override the cascade of styles.
Here is an example of an @font-face rule:
css
@font-face {
font-family: 'My Font';
src: url('my-font.ttf');
font-weight: normal;
font-style: normal;
}
This rule specifies a font called “My Font” that is located at the URL “my-font.ttf”. The font will be used with a normal weight and style.