B
I agree, because we know for a fact that a beast is a king as well as a kingdom; thus when the Bible says 'the beast and the false prophet are thrown into the lake of fire' we know it's two persons along with their kingdom.
Yes as that is the only way to look at it because a system can not be cast into the lake of fire, only the individuals who either lead or followed that system. And we can tell by Revelation the beast and false prophet are two separate individuals because there are still people left on earth that go through the millennial after they have been cast away into the lake of fire.