Which of the following helps to explain why even though northern latitudes experience 24 hours of sunlight on June 22, they are not warmer than latitudes further south?

• A. Some of the sun's energy is reflected by snow and ice in the northern latitudes
• B. Solar energy is spread over a larger area in northern latitudes
• C. Increased cloud cover reflects solar energy in the northern latitudes
• D. Solar energy is used to melt frozen soil in the northern latitudes
• E. All of these

Answer: (E)