A student has four metal containers, each holding the same volume of water at a temperature of $80\,^{\circ}\text{C}$. The containers are placed in a room at $20\,^{\circ}\text{C}$. Apart from the texture and colour of their surfaces, the containers are identical. Which surface will emit energy at the greatest rate?
- Adull black
- Bshiny black
- Cdull white
- Dshiny white