A catapult is used to project a stone. Which of the following energy conversions takes place as the stone is released?

• A The kinetic energy of the stone is converted into gravitational potential energy
• B The gravitational potential energy of the catapult is converted into kinetic energy of the stone
• C The gravitational potential energy is converted into elastic potential energy
• D The elastic potential energy of the catapult is converted into gravitational potential energy of the stone
• E None of the above