What is the error in the following fragment?
<audio> <source src="cancion.mp3" type="audio/mp4"> </audio>
The file "cancion.mp3" is not valid for <audio>.
<audio>
The ".mp3" extension does not match the "audio/mp4" type.
The <audio> tag does not have the controls attribute.
controls
The <source> tag cannot be inside <audio>.
<source>