The answer is D
Explanation:
On February 8, 1860, the Texas legislature passed an act providing for the formation of Greer County, with boundaries "beginning at the confluence of Red River and Prairie Dog Town River; then running up Red River, passing the mouth of the South Fork [Elm Fork] and following main or North Red River to its intersection with the twenty-third degree of west longitude (the 100th meridian); thence due south across the Salt Fork to Prairie Dog River, and thence following that river to the place of beginning." The act went into effect at once, but because of the confusion consequent to the outbreak of the Civil War little was done immediately toward organizing and putting into operation a system of county government. In 1884, however, 144,000 acres of land was patented to the Day Land and Cattle Company, which also leased 203,000 additional acres. By 1885 there were in the county some ten families and 60,000 cattle belonging to seven or eight firms that employed 100 men. The Francklyn Land and Cattle Company owned 40,000 cattle there. In July 1886 the settlers of Greer County met at Mobeetie and organized Greer County on the authority of the act of 1860. Mangum was named the county seat, and provision was made for a county government. Soon the county commissioners began building a county jail, planned to cost $11,000. Two post offices were established, one at Mangum and another at Frazier. A school system was set up, and by 1892 sixty-six school districts had been formed with an enrollment of 2,250 pupils.
