Which innovative ballot box security feature was first introduced in the United States during the 1890s reform era to combat widespread voter fraud?

Throughout history, the packaging and design of ballot boxes have evolved significantly as democracies developed. These seemingly simple containers have played a crucial role in election security, voter confidence, and the democratic process itself. Different nations have implemented various security features and designs to protect the integrity of votes. How well do you know the history and innovation behind these essential tools of democracy? Test your knowledge of this unique intersection of product design and political systems!

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Glass sides that allowed the public to view ballots inside the box
Electronic counting mechanisms that tallied votes as they were inserted
Biometric locks requiring election officials' fingerprints to access
Self-sealing ballot envelopes with tamper-evident adhesive