Changes of state occur when there is change in a. thermal energy b. electromagnetic energy c. chemichal energy d. eletrical energy

May someone me with these science questions

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d

Table sugar completely dissolved in water is an example of a?