What is the most likely evidence of an energy transformation taking place when a hotplate that has a beaker containing solid wax placed on it is turned on?

a Wax starts melting as kinetic energy is transformed into thermal energy
b Beaker starts moving as kinetic energy is transformed into thermal energy
c Wax starts melting as kinetic energy is transformed into gravitational energy
d Beaker starts moving as kinetic energy is transformed into gravitational energy