Which statement best describes a primary occurrence in an uncontrolled fission reaction.

Incomplete question. Options;

A) Mass is created and energy is released.

B) Mass is created and energy is stored.

C) Mass is converted to energy, which is released.

D) Mass is converted to energy, which is stored.

Mass is converted to energy, which is released

Explanation:

Basically, when uncontrolled nuclear fission (splitting) occurs, a radioactive atom (a mass) is split into two smaller nuclei leading to a continuous chain of fission reactions.

In other words, as the fission of the mass of the atom continues to occur, the mass is converted to energy, which is then released and more reactions occur.