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Passage: The Indus Valley Civilization, which flourished over 4,000 years ago, is known for its remarkably organized cities such as Mohenjo-daro and Harappa. These settlements featured advanced drainage systems, standardized brick sizes, and grid-patterned streets, suggesting strong centralized planning. Yet despite decades of excavation, scholars still debate why this civilization declined, with theories ranging from climate change to shifting river courses. Question: In the passage, the word ‘flourished’ most nearly means:
A. Was recently discovered
B. Declined gradually
C. Remained hidden
D. Thrived or developed successfully ✅