It sounds like you are using the web builder, but here is how I did it in Connect. Need to be sure the image file is in the 'media' folder for the survey. For my veg survey i have it setup as yes/no questions. So, in the choices tab I have CommonTansy.jpg in the 'image' field for my TansySelect list 'Yes' value. I don't think you can add more than one image and scaling, or zooming, doesn't seem to be possible on the app. I've tried and the image is a static size, no zooming. Hope this helps.
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