​If Tonight's Temperature Is Going to Drop into the Middle $\degree$

​If tonight's temperature is going to drop into the middle 20s ( $\degree$ F) and a fairly stiff wind is predicted, probably the best way to protect an orchard against a hard freeze is to (assume that cost is not a factor)

A) ​use helicopters.
B) ​use wind machines.
C) ​sprinkle the crops with water.
D) ​put orchard heaters to work.
E) ​pray for clouds.