Scenario: the internet explorer 8 browser is being used to display a web page with an audio player but the audio element displays nothing on the page.
read the following code snippet and select the reason for the incorrect display from the choices below.

question options:
a) the controls attribute should be controls="yes."
b) there are too many source elements.
c) there is no fallback content to display for browsers that do not support the audio element.
d) the mime type values are incorrect.