The question given above is not complete, the options attached to the question is given below:
A). Putting them in a deep pool of water
B). Burying them in a deep underground storage facility
C). Sending them on the shuttle to be suspended in space
D). Putting them in concrete/lead casks and sitting at the reactor site
ANSWER
The correct option is C.
There are many ways of storing spent nuclear fuel rods, these include: immersing them in deep pool of water, storing them in lead casks and burying them in deep underground storage. These forms of storage are utilized in order to protect people and the environment from the harmful radiations that radiate from these fuel rods. Spent fuel rods must never be exposed, therefore it is not possible to suspend them in space.