An ellipsoid height of -10.235 m. with a GEOID12b geoid height of -24.409 m was produced on a local benchmark with an published elevation of 46.47 ft. What shift would you apply (in meters) to your GPS derived elevation so the benchmark is matched. (a) -0.03 m. (b) -0.01 m (c) +0.01 m. (d) +0.03 m