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) .
-If you focus on the data from the mid-1900s (indicated by the arrow) through today, the graph shows that

A) there is a correlation between CO2 and temperature; when CO2 levels are high, so is temperature.
B) there is a correlation between CO2 and temperature; when CO2 levels are high, temperature is low.
C) there is no correlation between CO2 and temperature; CO2 fluctuates randomly and temperature is constant.
D) there is no correlation between CO2 and temperature; CO2 is constant and temperature fluctuates randomly.