The answer to the question is: Other (explain)
And the explanation is:
We should look at what happened at and around the Charlie Hebdo event. Look at what happened. Not listen to what the officials are telling us.
Have a look at this video.
And we see that the person laying on the pavement, acting victim, is firing off a bang-grenade that he has in his left hand. There is also a "spray" of smoke coming out from that grenade.
Once we realize this it put the whole event in a different perspective. It is a false flag, and a hoax. Perpetrated by the officials. The event has no other link to islam than what the officials are hoaxing you into believing.