The main advantage of plutonium breeder reactors over conventional hot-water reactors is: a. Reduction of the operation cost of the reactor
b. Reduction of thermal pollution.
c. Extension of the lifetime of uranium reserves
d. Reduction of the amount of plutonium produced.
e. Reduction of the threat of nuclear weapons proliferation.

A

Explanation:

c. Extension of the lifetime of uranium reserves

Explanation:

A plutonium breeding reactor is a nuclear reactor that promotes the extension of the useful life of pultonium reserves. This is because in this type of reactor, the cooling system is filled with liquid sodium, unlike conventional reactors. This makes the cooling system less efficient, but allows neutrons to be produced at the moment of the greatest energy from nuclear fission. In this case, the produced netrons reveal a high level of energy, increasing the useful life of the plutonium atoms produced during fission.