A ball of mass $1.2\,\text{kg}$ is released from a height of $30\,\text{m}$. During its fall, $25\%$ of its starting gravitational potential energy is changed into thermal energy. What is the kinetic energy of the ball immediately before it reaches the ground?
- A$27\,\text{J}$
- B$90\,\text{J}$
- C$270\,\text{J}$
- D$360\,\text{J}$