What is a class in CSS? a grouping of HTML tags for which style properties can be declared
a selector used to define a unique style
a tag used to apply styles to a block of content
the part of a declaration describing the type of style to be applied

Answer- A: a grouping of HTML tags for which style properties can be declared

Explanation: "In CSS, a class is a group of elements that are the same or similar. You can have as many elements as you want in a class. And each element can be the member of multiple classes. Every class has CSS attributes (like color and font-size) that are specific to that class. CSS classes are similar to a real-life class." skillcrush.com

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