In January 1980 the Mauna Loa Observatory recorded carbon dioxide (CO₂) levels of 338 ppm (parts per million). Over the years the average CO₂ reading has increased by about 1.515 ppm each year. What is the expected CO₂ level in ppm in January 2030? Round your answer to the nearest integer.
A. 399
B. 414
C. 420
D. 444
E. 459

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B. 414

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