Please help with an example in which using the wrong vertical datum and/or horizontal datum and/or map projection and/or coordinate system can cause a significant mistake and/or cost. For instance, in building the California High Speed Rail, if the rails are built starting from San Francisco, and another set of rails starting from San Diego, the rails may not meet in the center.
A) A misalignment of the rail tracks leading to safety hazards.
B) Increased costs due to needing to adjust the alignment.
C) Delays in project completion due to incorrect coordinates.
D) All of the above.