Scenario: the Firefox Browser Is Being Used to Display a Web

Scenario: The Firefox browser is being used to display a web page with a video but no video controls display -only the poster image is shown. Read the following code snippet and select the reason for the incorrect display from the choices below. < video controls="controls" poster="sparky. jpg"
Width="160" height="150" >
< source src="sparky.m4v" type="video/mv4" >
< source src="sparky.ogg" type="video/ogg" >
< a href="sparky.mov" >Sparky the Dog< /a > (.mov)
< /video >

A) The controls attribute should be controls="yes"
B) There are too many source elements.
C) The file extension .ogg is incorrect.
D) The MIME type values are incorrect.