A group of students performed an experiment to prove the law of conservation of energy. In the experiment, a flask containing water at room temperature was shaken vigorously for a few minutes. The table shows a partial record of the temperature of the water before and after shaking.

Experimental Record
Temperature
Before Shaking 21 °C
After Shaking Unknown

What best predicts the unknown temperature?
Group of answer choices

A. Less than 21 °C because heat energy is formed from the energy used in shaking

B. Greater than 21 °C because heat energy is formed from the energy used in shaking

C. Less than 21 °C, because the total energy of the system after shaking is higher than before shaking

D. Greater than 21 °C, because the total energy of the system after shaking is higher than before shaking