How plentiful were American chestnut trees in North American eastern forests before the blight?
%
If 25% of the eastern forest trees were American chestnut trees, this means that:
A - Trees in eastern U.S. forests cost 25 cents
B - 3/4 of eastern forest trees were American chestnut trees
C - One in every group of four trees was an American chestnut tree
D - 25 trees out of each group of 100 trees was an American chestnut tree
E - Both C and D.