What does this code display?

A button displaying I agree in emphasisA heading displaying InstagramA button displaying nothingA button displaying I agree in bold<html>
<body>
<h4>Oath to Code</h4>
<p>By clicking agree, you agree to commiting to learning how to code.</p>
<button><em>I agree</em></button>
</body>
</html>]]>

A button displaying I agree in emphasis