At the high temperatures necessary for fusion,matter exists as a plasma,which is

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A plasma is a state of matter in which atoms are ionized, meaning that the electrons are stripped from their atoms. This results in a mixture of unbound and highly energized nuclei (ions) and free electrons. At the high temperatures necessary for fusion, matter exists as a plasma, since the thermal energy is high enough to completely ionize the atoms. A is incorrect because a liquid form of a radioactive element would not be a plasma. B is incorrect because electrons and positrons would not form a gaseous cloud at the high temperatures necessary for fusion. D is incorrect because at high temperatures, the matter and anti-matter would annihilate each other, resulting in the opposite of a plasma. E is incorrect because a dense solid composed of neutrons would not be a plasma.

At the High Temperatures Necessary for Fusion,matter Exists as a Plasma,which