Chloe is training for her first half-marathon, which requires her to run 21.1 km. Before she runs, she carefully chooses the foods that will give her the energy her body requires for the race. She stands still at the starting line, then she starts running, her body warming up as she runs. Which three energy transformations take place in this example?
A. chemical energy to kinetic energy
B. chemical energy to thermal energy
C. mechanical energy to chemical energy
D. potential energy to kinetic energy