Which transportation retail innovation was first introduced by 7-Eleven in the 1920s that revolutionized the customer experience at fuel stations?

The intersection of transportation and retail has evolved dramatically over the decades. Fuel stations were once simply places to fill your tank, but have transformed into sophisticated retail operations with significant revenue streams beyond fuel sales. This poll tests your knowledge about how transportation retail hubs have developed their customer experience strategies to become essential parts of the modern travel ecosystem.

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Extended hours of operation (being open from 7am to 11pm, which gave the chain its name)
Self-service fuel pumps that allowed customers to refuel without attendant assistance
The introduction of branded coffee stations within convenience stores
Mobile payment systems that allowed customers to pay at the pump