The tree line is the edge of the habitat at which trees are capable of growing. It is found at high elevations and high latitudes. Beyond the tree line, trees cannot tolerate the environmental conditions (usually cold temperatures, extreme snowpack, or associated lack of available moisture
The answer to your answer is B because who cares what your freinds think,from a personal experience I shouldn't but I do,but still I shouldn't and neither should you or anyone else for that matter.
