A total station is set up 5.00 ft above a benchmark that has an elevation of 820.50 ft. A slope angle and slope distance of -315" and 645.90 ft, respectively, are measured to a reflector set up 4.25 ft above a hub at Point B. Neglecting curvature and refraction, the elevation (ft) of the hub at Point B is most nearly: A. - B. - C. - D. 785.76 784.63 783.88 779.63 5.34