Each of the Following Is an Argument Offered in "Up

Each of the following is an argument offered in "Up for Debate: Has Our Enthusiasm for Regulation Gone Too Far?" except:

A) new standards set by the Clean Air Act have little cost associated with them.
B) health benefits from higher clean air standards should be questioned, particularly with regard to ozone.
C) businesses may be forced to find more efficient ways to operate in meeting new clean air standards.
D) all of the above are not arguments offered.