I think B looks the nicest of the three by far. Good use of a monochromatic color scheme, nice balance between background and foreground elements, perfectly readable at a distance.

The design direction of A is a bit busy and stands out a little too much IMO, it looks kind of out of place next to stock iOS apps. C looks a bit too amateur, and has several tangents in it that really bother me - I do like the overall idea of it, but it could really use a rework.

Burmese pythons are highly invasive to Floridian ecosystems. Back in the day, a lot of idiots would purchase them as pets without realizing how big they would get. Instead of handling it responsibly, the owners would let the pythons out into the wild when they grew too big. It sucks, but taking them out is the only reasonable way to deal with such an issue. Similar situation with wild boars, except those guys are tasty.