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How windbreaks functions is:

[A].	The air is baffled and mixed as it hits the wind breaks	[B].	Causing a disruptive turbulence patterns which spoils the energy and velocity of the wind
[C].	This mixing and churning continues as the pressure gradient is built by the windbreak and the air leaks through or rolls over the top of the screen	[D].	All of the above

Answer: Option D