Answer:
D. Mathematically
Step-by-step explanation:
Map projections are mainly derived mathematically.
The projection of map involves series of transformation between the spherical shape of the earth to fit a plane. It is a simply a 3-D dimensional transformation of the earth surface to a 2-D plane on paper. The longitudes and latitudes that defines point must be accurately and precisely transformed to represent their original scenario. It is nearly impossible to get this transformation right as distortion can occur in one way or the other.