[WEBSITE] Cannot click audio button(s)

In this picture for example, I can only click and listen to the 3rd option. Clicking on the first 2 options does nothing.

Is the 3rd option the correct answer? Did you notice this in other courses as well?
Just wondering - the problem might be in the course itself, i. e. empty audio files.

@MemriseSupport, @MemriseMatty: are you aware of an audio-problem on the web?