Answer: The true statement is C.
Step-by-step explanation:
Nuclear fission is the process of the splitting of the unstable heavy nucleus into the lighter nuclei. The huge amount of energy is produced during this process. Hydrogen bomb is the example of the nuclear fission.
Nuclear fusion is the process in which two lighter nuclei combine together to give a heavy nucleus and the tremendous amount of energy is released in this process. Nuclear fusion occurs in the Sun.
Therefore, both these processes can provide energy.