A.
Geothermal energy has some disadvantages, but it is probably going to be used in the future.
B.
Geothermal energy is a source that should be explored further before large-scale production begins.
C.
Geothermal energy offers an opportunity to supply a significant amount of power in the future.
D.
Geothermal energy should replace water power in the production of electricity for the United States.