The temperature versus time graph of a solid substance absorbing heat is shown. A graph is shown with Temperature followed by degree Celsius in parentheses labeled on the y axis and Time followed by minutes in parentheses labeled on the x axis. An upwards arrow is shown between y axis and the label and a right pointing arrow is shown between the x axis and the label. A slanting graph line starting at a point A near the intersection of the two axis is shown. The slanting graph after a point B starts running parallel to the x axis till point C. The line after point C slopes upwards till point D and then runs parallel to the x axis till point E after which it again slopes upwards to finally terminate at point F. What best describes the change taking place in section CD of the graph? a The intermolecular bonds of the solid state are being broken as particles vibrate faster. b The intermolecular bonds of the liquid state are being broken as particles flow faster. c The particles of the solid vibrate faster as the kinetic energy of the particles increases. d The particles of the liquid slide around faster as the kinetic energy of the particles increases