If you are having difficulty selecting a response within the virtual job tryout (VJT), it is likely that you are on an example page.
You can see this by locating the watermark 'example' in the background of the screen.
On this kind of page, you are not able to use the button 'Play audio' because it just shows you what the questions will look like. All you have to do is click the 'Next' button on your screen.