What happens when we change the background-color of the h1 element?

The background color changes only for the h1 elementThe background changes only for all elements on the webpageThe text color changes only for the h1 element<html>
<head>
<style> body { color: grey; } h1 { background-color: blue; }
</style>
</head>
<body><h1>The Anti-Social Network</h1> <p>Daniel checked-in somewhere</p>
</body>
</html> ]]>

The background changes only for the h1 element.