Nearly all scientists agree that global warming is taking

Nearly all scientists agree that global warming is taking place. But, scientists will also readily tell you that our weather forecasting tools are too primitive for accurate forecasts 100 years ahead. They simply use simplistic computer models, not because these tell the truth, but because they have nothing better. These typically predict some warming. But they represent assumptions, not scientific truth.

Which of the following, if true, would serve to weaken the argument against global warming forecasts.
(A) 100 countries across the globe recorded abnormality in seasons but no forecast had been made.
(B) The weather forecasting tools used today were unheard of even a few decades ago.
(C) A 100 year period forecast is based on computer simulations using millions of variables that reflect real complexities.
(D) Scientists are aware of exactly what kind of computer models are used today.