单选题 The author mentions the transfer of momentum and energy in order to indicate that

• (A) eddies, and not just jet streams, modify the distribution of temperature and kinetic energy within the atmosphere
• (B) the relationship between baroclinic waves and the jet stream that produces them is decidedly reciprocal
• (C) the process of secondary atmospheric circulation has a pronounced effect on the location and movement of the jet stream
• (D) eddies play as great a role in dictating fluctuations in global temperatures as do the jet stream
• (E) the meridional temperature gradient between the equator and poles produces a very diverse variety of atmospheric phenomenon