Which of the following correctly uses div to style multiple elements the same way?

Option B is the best choice because it effectively utilizes the div element to encompass multiple elements that share a common styling. By placing both an h2 element and a paragraph (p) element inside the same div with the class "intro," you can easily apply consistent styles to all contained elements using CSS. This means that any styling assigned to the class "intro" will affect both the h2 and p elements, demonstrating how the div can be used as a container to manage the layout and appearance of multiple components simultaneously.

The other options do not provide the same level of versatility or effective grouping for styling. For instance, option A only includes a single paragraph within the div, limiting the scope of styles that can be applied. Option C lacks a class altogether, which means that there is no opportunity to apply shared styling through CSS. Option D, while using a div to contain a span, only includes a single element as well, which diminishes the effectiveness of using div for grouping elements that can be styled collectively.