Despite the Overall Increase in Forested Areas in the United

Despite the overall increase in forested areas in the United States, concerns remain because

A) different tree species have been used to replant harvested areas.
B) replacement trees have been genetically modified to grow straighter than the original trees.
C) food production has declined as cropland is converted back into forest.
D) these second- growth forests lack the ecological complexity of the old-growth forests they are replacing.