The development of nuclear power has provided electricity for less money, but at a cost. What may be considered a "cost" of nuclear power? 
 A. Large amounts of energy are produced very cheaply. 
 B.
 It takes a lot of energy to run a nuclear power plant. 
 C.
 Nuclear power plants provide new jobs for a community. 
 D.
 The radioactive waste is unsafe and hard to store safely.