Answer:
C. It is reduced.
Explanation:
A reduction-oxidation reaction commonly known as redox reaction is a type of chemical reaction that involves the transfer of electrons from one molecule to another. In a redox reaction, the oxidation state of atoms changes due to the donation and reception of electrons.
A redox reaction contains an oxidizing agent, which accepts the electrons and a reducing agent, which donates the electrons. The gaining of electron(s) by an oxidizing agent gets it reduced i.e. decreases its oxidation state while the donation of electron(s) by a reducing agent gets it oxidized i.e. increases its oxidation state.
In this question, the half reaction of a redox reaction is described where Iron (Fe) gains electrons. This means that iron is the oxidizing agent in this redox reaction and by gaining electrons, it becomes reduced.
