The geopolitical conflict between the Vijayanagara Empire and the Bahmani Sultanate (and later the Bijapur Sultanate) centered heavily on the control of the Raichur Doab. Which of the following best explains the strategic and economic significance of this region?

Options:

• A: It was the only land route connecting the Deccan to the ports of the Malabar Coast.
• B: It contained the rich iron ore mines necessary for manufacturing advanced artillery.
• C: It was a highly fertile tract of land between the Krishna and Tungabhadra rivers, rich in diamond mines and agricultural revenue.
• D: It served as a natural buffer zone that prevented direct military contact between the two empires.

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