At upper transit, if the zenith distance is 34°, the geographical distance from the observer to a body's GP is __________.

Correct Answer: Option C — 2040 miles

Geographical distance in nautical miles from an observer to a body's Geographic Position equals the zenith distance in degrees multiplied by 60. Multiplying 34 degrees by 60 nm yields 2040 miles, a standard navigational conversion derived directly from fundamental spherical trigonometry principles outlined in Bowditch.