The Run -Of -River Approach to Hydropower Often Involves __________________

The run -of -river approach to hydropower often involves __________________

A) the purchase of state -run dams by major corporations
B) the most expensive type of dams to build and maintain
C) dams that are reliable but unsustainable
D) impounding water in reservoirs behind concrete dams
E) diversion of a portion of a river's flow through pipes