Click for clue, reduces earnable points.

I'm a noob at articulate, and I'm doing a quiz on mushroom families. My idea is to have slides where  there is a picture of a species or two, and a box to enter your guess to what family it belongs. I would like to have a clickable choice to show some text which has some info of the family, like clues, but clicking it reduces the amount of points you earn if you get it right. I have been messing around with it for a while, but cannot really figure out how to do it. Any tips or pointers? Thanks.

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