Suzy's science class is studying changes in particle motion during phase changes. Suzy is asked to add a few pieces of dry ice to a flask and cover it with a balloon. After a few minutes she observed the balloon starting to inflate. How can she explain this? A) The cooling effect of the dry ice as it undergoes a phase change from solid to liquid expands the gas and inflates the balloon. B) While the dry ice cools the flask, it undergoes a phase change from solid to liquid. The greater freedom of the particles expands the balloon. C) As the temperature rises, the dry ice undergoes a phase change from solid to gas. The expanding gas molecules exert pressure on the walls of the balloon. D) The dry ice particles under go a phase change from solid to liquid as it warms to room temperature and experiences an increased volume which inflates the balloon.