Which Pumpkin Will Rot First?

Today room 4 viewed their pumpkins! Room 4 guessed the jack-o-lantern would rot first. They guessed right! Our rotting experiment was a success! After 7 days in a warm classroom;

Pumpkin 1- the WHOLE pumpkin was unchanged.
Pumpkin 2- the jack-o-lantern was VERY rotten
Pumpkin 3- the pumpkin cut into 2 pieces had also started rotting