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Verbal·Expression of Ideas·Transitions
easy
Geothermal power plants utilize steam extracted from subterranean reservoirs to turn turbine generators and produce electricity. In Iceland, volcanic geology provides an exceptionally shallow geothermal resource, allowing geothermal energy to supply over of the country’s primary energy needs.        in regions lacking active tectonic boundaries, drilling deep enough to access equivalent subterranean heat is often economically prohibitive.
Which choice completes the text with the most logical transition?
A
In contrast,
B
For instance,
C
As a result,
D
Furthermore,