Add an option to allow the facilitator (or perhaps everyone) to see who voted for what.
In most case, a facilitator prefers to have anonymous voting. In some cases, it would be nice for everyone to see who voted for what. This could be implemented so that only the facilitator sees who voted for what or the voting results could be shared with everyone. Of course, whatever voting mode is being used the prompts would make it clear whether it is anonymous voting or not.
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