Anyone want to help me play yarn detective? I...picked up a couple more balls from the box upstairs (it's been there for days, apparently, so people have Had A Chance) but they have no labels.

Ok, mystery yarn A has clearly been knitted before, and this is several balls of it. Between about 12 and 16 WPI, single ply, but fairly tightly spun. Burns like it's a wool/acrylic blend; self-extinguishes quickly. Colors are very short—often only ~1"

Mystery yarn B is 20 wpi on the nose, is mostly wool, three-ply, very round. Reminds me of Happy Feet DK but has way more of a sheen than I remember HF having.

Mystery yarn C, 14 wpi. I was sure that it was going to be a weird soft acrylic, but the burn test makes me think it's another acrylic/wool blend. The color's a gradient and each shift lasts about 6". I don't even know where to start with this one.

It's worth noting that in A, the colors are very distinct—there's nowhere that the colors were blended in the spinning. (There are lots of single plies that are almost right, but were clearly dyed before spinning, and this was not, imo.)