Which innovative feature was FIRST introduced in government e-procurement platforms that revolutionized public sector purchasing?

Government procurement systems have evolved dramatically in the digital age, transforming how public sector organizations acquire goods and services. These specialized e-commerce platforms have unique features designed to ensure transparency, compliance with regulations, and efficient use of taxpayer money. Test your knowledge about how modern digital procurement has changed the landscape of government purchasing!

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Blockchain-based contract verification (2018)
Reverse auction bidding systems (2003)
AI-powered vendor risk assessment (2015)
Integrated carbon footprint tracking (2012)