What Best Explains Why Producing Electricity Via Geothermal Energy Is

What best explains why producing electricity via geothermal energy is restricted geographically?

A) areas where shallow crustal rocks are sufficiently hot are relatively rare.
B) most geothermal areas are far from the electrical grid.
C) most geothermal areas are far from the nearest population center.
D) due to high infrastructure costs, geothermal areas are restricted to developed nations.
E) due to the need for water, geothermal areas must be near a body of water.