The 2007 Intergovernmental Panel on Climate Change (IPCC) Has Concluded

The 2007 Intergovernmental Panel on Climate Change (IPCC) has concluded that:

A) it is premature to include feedback effects in predictions of global warming.
B) today's average temperatures are similar to average temperatures in between past ice ages.
C) over the past 50 years, temperatures have risen by 0.13°C per decade, about twice the rate over the previous 50 years.
D) the projected rise in temperatures can be lower if feedback effects are taken into consideration.