Context: The objects are identical except for their temperatures.
Which object has the most thermal energy?
A. a 9-kilogram bucket of water at a temperature of 14°C
B. a 9-kilogram bucket of water at a temperature of 21°C
C. a 9-kilogram bucket of water at a temperature of 35°C
From the given choices, select the correct answer and reply with the letter of the chosen option.

C