Answers Options:
A) predictable cycles of disturbances in radio and satellite communication systems on Earth.
B) continual disturbances of radio and satellite communications systems on Earth.
C) infrequent disturbances of radio and satellite communications on Earth.
D) amazing auroras in Northern latitudes on Earth every winter.
A, predictable cycles of disturbances in radio and satellite communication systems on Earth.
Is the answer. I just took the test!