Use the Following to Answer Question

Multiple Choice

Use the following to answer question:
-Heat is added to a substance at a constant rate.The substance starts as a solid and is melted; the liquid is heated and vaporized; finally,the vapor is heated.This process is shown in the graph.Which of the following statements is correct?

A) The latent heat of fusion is greater than the latent heat of vaporization.
B) The latent heat of vaporization is greater than the latent heat of fusion.
C) The latent heat of vaporization is equal to the latent heat of fusion.
D) The mass of the substance must be known before any statements about the latent heats can be made.
E) The relative sizes of the latent heats depend on the rate at which the heat is added.