Multiple Choice

-According to this graph, carbon dioxide emissions were approximately 300 PPM
A) in the year 1900 and 400 PPM in the year 2000.
B) in the year 1900 and 375 PPM in the year 2000.
C) in the year 1980 and 375 PPM in the year 2000.
D) in the year 1900 and 350 PPM in the year 2000.
E) in the year 1950 and 400 PPM in the year 1980.
Correct Answer:
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