What might be the adaptive significance of these unusual forests growing the way they do in this marginal habitat?

A) Needles are adapted to withstand cold arctic temperatures. B) Branches are adapted to absorb more CO2 with this displaced alignment. C) Taproot formation is impossible, so trees developed shallow root beds. D) Trees are tilted so snow prevents them from breaking or tipping over. E) Trees tip so that they do not compete with each other for sunlight.