I voted A, but I'm probably more accurately a combination of A and C. A is almost completely fitting. I'm very much a learner and have always been a bookworm to the extreme. I'm soft-spoken in general, but not shy, and have no problem getting rambunctious and 'loud' or at least very talkative, under the right circumstances and/or around the right people. The 'lonely' part of C suits me mainly only in my mood of the past few months, but not in terms of being a lonely or loner type person in general. I actually have a good many friends of all kinds, and am generally very well-liked by most people who know or meet me. But the rest is very suiting, lol.
There's also a little bit of B in there. By most people's standards, and especially people of the opinions I see represented on this site, I'd fit the 'wild party animal' description as well. Especially the last half of my teen years. These days I stay in more or hang out in groups of friends at other people's houses, rather than go out. But I have a long history of experimenting with drugs [I've tried pretty much all of them at least once, many much more than once] and using many recreationally, semi-regularly at one time or another, going through bursts and phases of certain things I like [and therefore partake in] more than others, cycling through over the years. I STILL do drugs and enjoy different manners of getting 'f.ucked up'. Not such a wide variety anymore because I've tried enough things enough times to know what I like, but a couple I do fairly regularly. S.hit, I'm high right now, in the safety of my own home. =P I don't go OUT and 'party' hardly at all, but at home with my roomies/friends or at friends' houses, sure. Not wildly and out of control in large loud groups, but socially/casually with the people that are close to me. By most peoples' standards, someone who does any drugs at all is considered a 'partier', but I don't really think of myself that way. I don't get out of control messed up, I don't get in trouble, put myself in any real danger or anyone else for that matter, I'm not destructive or even self-destructive in my drug use, in that my reasons for doing them and enjoying them have nothing to do with my self-esteem or masking my problems or emotions, I'm simply a lover of new experiences [in all aspects of my life, not just relating to drugs] and altered states of mind. I don't start or get involved in drama, I'm very laid back and responsible with the things I DO do. I educate myself on anything and everything I choose to put in my body recreationally. And in doing so, I prefer the company of people who are like-minded in that way and who also handle themselves and their vices responsibly. I'm also a very sexual person, but not in an any way scandalous or unsafe manner.
I'm kind of expecting some downvotes on this, haha, but I like who I am and I'm not ashamed of any of the things I've described here that are part of who I am and influenced the person I am today.