King Ranch is the largest ranch in the United States, consisting of four plots of land in southeastern Texas totaling over 825,000 acres (333,800 hectares).
Richard King was a riverboat captain, confederate, entrepreneur, and most importantly, the founder of the King Ranch in South Texas, which comprised over 825,000 acres at the time of his death in 1885.
During 1869 and 1884, King sent more than 100,000 head of livestock up the trails to northern markets, assisting in the stocking of the American West's growing ranges and the establishment of the American ranching business.
Therefore Option A is correct as he was the founder of Texas's largest Ranches.
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