According to best practices, class selectors are used to style which of the following?

Class selectors are particularly effective for styling groups of elements because they enable the application of the same styles to multiple elements that share a common class. For instance, if a group of paragraphs should have the same font size and color, assigning them a shared class allows for consistent styling without having to apply inline styles or individual element selectors for each paragraph.

Using class selectors enhances maintainability and scalability in design; if adjustments need to be made, you can simply change the class definition in one place rather than modifying each element separately. This makes the styling process much more efficient, as it leads to cleaner and more organized CSS code.

In contrast, single elements can be styled with ID selectors or by directly targeting those specific elements. Unique elements with distinctive styling requirements typically utilize specific class or ID selectors, but class selectors excel in scenarios where multiple elements need to share the same attributes. Thus, the effectiveness of class selectors is best demonstrated in their ability to manage groups of elements seamlessly.