A metal spoon is placed in one of two identical cups of coffee. After a few minutes the cup with the spoon has a lower temperature than the cup without the spoon. Which statement best explains this?
A. Energy is removed from the coffee mostly by conduction through the spoon.
B. Energy is removed from the coffee mostly by convection through the spoon.
C. Energy is removed from the coffee mostly by radiation through the spoon.
D. There is no energy transfer between the spoon and the coffee.