Fade 4 out of 5 lines out: Audience Response Questions

Hi:
I have to give a talk where the audience uses those remote responder devices. Thus, I will post a text slide with a question and 5 possible responses on it. The audience will then have a time period to choose their answer to the question.
What I would like to do would be to have the 4 incorrect responses to the question dissolve from the slide at this time in response to a single mouse click by me, leaving only the correct response. Any ideas as to how I can design a build to do this? I'm having trouble with this.
Thank you!

If you've got a basic black background, just cover the wrong answers with black rectangles set with the opacity at, say, 50%. One one slide, you'd have your answers all fully displayed and, on the next slide, you'll have three of them obscured. Put a dissolve transition between the two, and I think that will give you what you need.
Alternately, if you're using a theme that won't look right with a semi-opaque rectangle on it, simply change the opacity of your "wrong answer" text on the second slide. Still use the dissolve and the three wrong answers will fade out.

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