What are the coefficients for the following reaction when it is properly balanced?
___O2 + ___CH4 ? ___CO2 + ___H2O
A) 2, 1, 3, 1
B) 2, 3, 2, 2
C) 1, 3, 2, 1
D) 2, 1, 1, 2
E) none of the above
Answer: D
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