The verified response to “Ancient History question: Which river or river-region is associated with Rakhigarhi?” is Ghaggar-Hakra plain, option C. The original question-specific evidence states: Rakhigarhi is associated with the Ghaggar-Hakra plain region. Ghaggar-Hakra plain is the correct answer to “Which river or river-region is associated with Rakhigarhi”. This evidence connects the required Ancient History fact with its archaeological, geographical, cultural or chronological setting. The choices Sutlej, Ghaggar-Saraswati region and Arabian Sea coast do not satisfy the same combination of site, feature, river region, crop, craft, discovery, chronology or cultural association. Replaying that method confirms Ghaggar-Hakra plain as the keyed response for this Ancient History question.