Both the Clinton and G

Both the Clinton and G.W. Bush administrations were unwilling to sign the Kyoto Protocol. What was their primary objection to the treaty?

A) The target emission levels are not sufficiently low to affect the greenhouse effect.
B) The treaty does not include a provision for trading emission allowances.
C) Developing countries are not required to control greenhouse gas emissions.
D) Enforcement of the treaty will be impossible.