Currently, Spent Fuel Rods Used to Power Nuclear Reactors Are

Currently, spent fuel rods used to power nuclear reactors are

A) stored outside of the reactor in water-filled pools and years later, in dry casks.
B) sent to a national repository.
C) placed in metal drums and dumped deep in the ocean.
D) loaded into rockets and shot into space.
E) treated chemically to speed up the progression of half lives.