The heat of fusion of ice is 80 cal/g, the heat of vaporization of water is 540 cal/g, C_ice= o.50 cal/g-C, and C_water=1.00 cal/g-C. Which of the following involves the greatest heat transfer?
A. One gram of steam at 100 degree C changing to water at 100 degrees c
B. One gram of ice at 0 degrees C changing water at 0 degree C
C. One gram of water cooling from 100 degree C to 0 degree C
D. One gram of ice heating from -100 degree C to 0 degree C