According to the law of conservation of energy, A) an object loses most of its energy as friction. B) the total amount of energy for a system stays the same. C) the potential energy of an object is always greater than its kinetic energy. D) the kinetic energy of an object is always greater than its potential energy.

Hello there. According to the law of conservation of energy, According to the law of conservation of energy the total amount of energy for a group of objects stays the same. If one object in a system loses energy (of any form) something else must gain it, usually as heat. Therefore answer would be,  the total amount of energy for a system stays the same. Option B

the total amount of energy for a system stays the same, is the answer