The Graph Shows Records of Temperature (Light Gray Line) and CO₂

Multiple Choice

The graph shows records of temperature (light gray line) and CO₂ (dark gray line) over the past 1,000 years. CO₂ is recorded in parts per million (ppm) .
-Currently, atmospheric CO₂ levels are approximately 400 ppm. The annual mean growth rate in CO₂ is about 2 ppm/year. Assuming this trend continues, what would you predict the CO₂ level to be in 100 years?

A) 100 ppm
B) 200 ppm
C) 600 ppm
D) 1,000 ppm