Answer: the ordering is justified by calculating the corresponding temperature differences and sorting in descending order.
Step-by-step explanation:
The energy exchange rate is a function of the temperature difference between two parts (here the sphere and the surroundings). The larger the difference the higher the rate of exchange.
The differences are as follows:
A: 65 degrees --> second highest rate of energy transfer
B: 80 degrees --> highest rate of energy transfer
C: 60 degrees --> lowest rate
Therefore, the ordering will be B->A->C