C & B are switched so I'm not sure if that was a typo or not, but the answer is concentration!
Answer:
it will float if the object is 1g/cm^3(water 's density ) because it is less dense
True, nuclear fusion is a reaction in which multiple atoms come in contact to form new atom and subatomic particles. in a nuclear fusion, some of the mass is lost which defies the law of conservation of mass, but according to scientist the lost in mass is manifested in the production of huge amount of energy,
