I go with B: Somewhat Sincere.
They have gone through a lot of trouble lately declaring that they do not experience revelation or inspiration as part of their calling. Why would they do this if they didn't have some misgivings. They know most JWs envision them as prophets, and as guides appointed by Jehovah to lead his organization. But it must be tough to lead lives where you're at the top and you get NOTHING! After all, you're supposed to feed God's people spiritual meat and drink and it's like pointing a radio telescope up at the sky and getting residual static. On the one hand, they're coming up empty handed, but on the other, what other religion could be right?
Option 1: If JWs aren't right, then who is? We've thought it out and we're as perfect as perfect can be. Let's hold an even keel and hope for the best.
Option 2: God has revealed everything he intended to. He expects us to take the spiritual meat and feed it to the congregations, which we're doing. Nothing's wrong.
Option 3: We could have figured this whole thing out wrong, but as long as we don't actually claim to be prophets, we can have some degree of plausible deniability.
Option 4: We're not who we've made ourselves out to be. We used to imply we had the inside track to God, but we've been disasters when you think about it. Every single date we've been wrong about and every event we've claimed had to be invisible, so even we couldn't see it. We're screwed, but if we jump ship, what happens if the Watchtower thing is real?
Quite a choice to make, no?