Which product development breakthrough allowed Tesla to achieve a significant competitive advantage in the electric vehicle market around 2012?

The transportation industry has seen remarkable product development innovations that have revolutionized how we move people and goods. Major companies have invested billions in research and development to create groundbreaking technologies that improve efficiency, safety, and sustainability. This poll tests your knowledge about a significant product development milestone that changed the course of modern transportation. Can you identify the correct breakthrough from among these plausible transportation innovations?

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The introduction of the Supercharger network, a proprietary fast-charging infrastructure system
Development of the first fully autonomous self-driving system called Tesla Autopilot
Creation of the industry's first battery swap technology for 90-second complete battery replacement
Implementation of the first over-the-air software update system for vehicles