A student places a metal spoon in a bowl of hot soup. After a few minutes, the handle of the spoon becomes warm. Which of the following correctly describes the primary method of heat transfer that causes the spoon's handle to warm up?
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A
Convection, because the heat from the soup circulates up the spoon.
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B
Radiation, because the soup emits thermal energy in the form of waves.
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C
Conduction, because heat energy is transferred from particle to particle along the spoon.
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D
Insulation, because the metal prevents the heat from escaping the soup.