The Auroras in the Upper Atmosphere Are Caused by

Multiple Choice

The auroras in the upper atmosphere are caused by

A) UV and visible light interaction with the asthenosphere.
B) interaction of the solar wind and upper layers of Earth's atmosphere.
C) sun spot activity and gravitational accretion.
D) coronal mass ejections entering the atmosphere at lower latitudes (below 30°) .
E) stratospheric ozone depletion.