Which Is True of Upper Atmospheric Circulation

Multiple Choice

Which is true of upper atmospheric circulation?

A) It refers to the winds in the thermosphere.
B) These winds are unrelated to surface weather patterns and of no consequence to the atmosphere's general circulation.
C) Middle and upper tropospheric circulation is an important component of the atmosphere's general circulation.
D) These winds flow principally from the east in the mesosphere.
E) These stratospheric winds are responsible for the movement of CFCs to the poles,contributing to ozone depletion.