Which groundbreaking product innovation did the Oxford English Dictionary introduce that fundamentally changed how dictionaries were created?

The Oxford English Dictionary represents one of the most significant product innovations in linguistic history. This massive undertaking revolutionized how we document and understand language evolution. Test your knowledge about this landmark reference work that transformed linguistic research and became the gold standard for dictionaries worldwide.

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The use of historical quotations to show how words changed meaning over time
The alphabetical organization of entries, replacing thematic groupings
The inclusion of pronunciation guides using phonetic symbols
The subscription-based publishing model that funded its creation