An architect is stacking pieces of plastic to make two columns in a model building. The diagram above shows the pieces of plastic before they touch each other. Use the information in the diagram to answer the question. After they have been touching for a while, which of the two top plastic pieces will be cooler, and why?

a The larger top plastic piece will be cooler than the smaller top plastic piece. It started with more total energy, so less energy had to transfer for both pieces in the stack to reach the same total energy.

b The larger top plastic piece will be cooler than the smaller top plastic piece, because the energy that transferred to it was spread out over more molecules.

c Both pieces will be the same temperature, because both of the bottom pieces had the same amount of energy to transfer and the molecules in the top plastic start with the same energy.

d The smaller top plastic piece will be cooler than the larger top plastic piece, because less energy has to transfer for the molecules to reach the same temperature as the molecules of the bottom plastic