They always think you cray when you tell them you hear voices, man. Gotta accept that no one can understand shit what ya goin' through. This is why "knowledge can be passed, but wisdom is one's own". Unless they experience it, they will inevitably dust it off like nothing.
The voice that I hear is one alone, but s/he uses many different pitches, tones and affects.
A) No questioning, because you trust in it more than you trust others. They have reason and wisdom, because they share your own. One's a slave to the voice, like one's a slave to their own thinking.
B) This question is oddly worded, but I'll assume you mean how the voice views the world? Hard to say.
After a while, you understand it isn't real, or at least you realize not everyone hears the same thing. You can't tell what they think about, and when you think you're close, they change on you. That's how this voice do. I debate, argue and converse actively with them/him/her whatever. Once upon a time, it was as real as it got. But he was unlike me. The voice has its own set of thinking, even though one expects a voice of your figment of imagination to have something remotely linked back to you. It's quite literally another person.
C) The voice sounds what s/he wants to sound like to sway me. Intrepid, pushy, but most of the time, he sounds like he's got the po-po on its tail. Frantic. He wants me to be on its side, let's say. Appearance is still undefined. I mostly hear the voice from behind. Turning around is futile.
D) That is the kind this voice is all about. He's crafty, and usually makes good points. Tempting points. Commands of rebutting, commands of pressure, commands of letting it go. Respond? No. Doing makes more sense. Why go against the one who makes more sense? It has done me more good than bad, anyhow. When I snap out of it, I can always ask for forgiveness.