Which of the following best explains why a person suffers a more severe burn when his skin is exposed to steam than when boiling water is poured onto his skin?

• A.steam possesses greater heat energy per unit mass than boiling water
• B.steam is at a higher temperature than boiling water
• C.steam is at a higher speeds more easily over a wider area of the skin than boiling water
• D.steam penetrates more deeply into the skin than boiling water.