How can you specify a class in HTML?

The class in HTML is specified using the class attribute, which enables you to assign one or more class names to an HTML element. This is done by including the attribute within the opening tag of the element like this: class="classname". This method allows for the grouping of elements, which can then be styled collectively using CSS. By defining classes, CSS rules can be efficiently applied to multiple elements, fostering easier styling and a more organized approach to design.

In contrast, using the id attribute is meant for unique identifiers of single elements, rather than grouping multiple elements as classes do. Wrapping content in a tag is simply a method to apply inline styles or specific behaviors to that part of the content, but it does not inherently define a class. Finally, using the style attribute directly motivates inline styling which can lead to maintenance challenges, as styles become tangled with markup rather than being consolidated in CSS files. Thus, the correct way to specify a class in HTML remains the usage of the class attribute, making option B the right choice.