Which retail innovation revolutionized the literary market by allowing customers to discover books based on their reading habits and preferences using AI algorithms?

In today's competitive market, bookstores and art galleries are constantly innovating to attract customers and stay relevant. This poll tests your knowledge about a groundbreaking retail innovation that transformed how we interact with books and literary arts. Can you identify the correct retail technology advancement that changed the literary landscape?

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Amazon's Kindle Recommendation System, which uses collaborative filtering to suggest books based on similar readers' preferences
Barnes & Noble's 'Nook Color Matchmaker', which analyzes book covers to create visually harmonious home libraries
Waterstones' 'Literary Fingerprint' scanner that identifies compatible authors by analyzing a reader's handwriting
The Library of Congress 'Emotional Response Index' that pairs books with readers based on biometric feedback to sample texts