Which of the Following Is True of the Ionosphere

Multiple Choice

Which of the following is true of the ionosphere?

A) It primarily absorbs harmful infrared wavelengths.
B) All radio signals pass through this region virtually unaffected.
C) Radio waves from GPS are strengthened in the ionosphere.
D) It is being depleted through interactions with human-produced chlorofluorocarbons.
E) The region principally absorbs gamma rays,X-rays,and interacts with the solar wind.