There Is a Coal Burning Electric Power Plant in the Vicinity

There is a coal burning electric power plant in the vicinity of this forest. What is most probably responsible for the dead trees?

A) transportation of coal to the electric plant has physically harmed the trees' roots
B) the heat from the power plant raises the ambient temperature in the forest, which stresses the trees
C) particulate matter emissions associated with the combustion of coal can reduce photosynthesis resulting in forest decline
D) sulfur and nitrogen oxides from power plant's emissions react with water vapor resulting in acid deposition which contributes to forest decline
E) the dead trees are the natural result of a mature forest