Airlines Sometimes Reroute Planes Away from Polar Regions During Solar

Airlines sometimes reroute planes away from polar regions during solar storms because

A) radio communication can be affected by solar storms.
B) solar storms can lead to severe turbulence.
C) ​solar storms increase air temperature,which can present a danger.
D) ​the plane could get hit by particles.
E) ​the sky can become too bright for safe navigation.