Why are gamma rays not affected by a magnet as they pass over it?

a: gamma rays are composed of only energy.
b: gamma rays do not have enough mass to be affected.
c: gamma rays do not have the right electrical charge to be affected.
d: gamma rays move too fast for anything to affect their pathway.

Gamma is not affected by both fields because it isnt charged. 

Only alpha and beta ray will be affected because they are charged with positive and negative ions respectively.

In otherwords, Gamma rays are high-energy photons of light, which have zero electric charge. So they are not affected by magnetic fields

Here's a chart. .

If that doesnt help tell me :)