Which retail innovation first introduced the concept of self-service medication selection in pharmacies, fundamentally changing how consumers interact with pharmaceutical products?

The pharmaceutical retail landscape has transformed dramatically over the decades. Today's pharmacy chains offer prescription services, health consultations, vaccinations, and consumer goods—a far cry from the apothecaries of the past. This trivia question explores a pivotal innovation in medical retail that revolutionized how patients access medications and health services. Test your knowledge of pharmacy retail history!

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The Boots Model (1920s) - allowing customers to browse medications in glass display cases while pharmacists provided consultation
Walgreens' Self-Service Revolution (1950s) - moving non-prescription medications to open shelving and implementing the first pharmacy retail planograms
Pharmacy Supermarkets (1970s) - combining grocery shopping with expanded pharmacy departments featuring self-selection areas
The CVS CarePak System (1960s) - introducing standardized packaging that enabled safe customer self-selection of common remedies