Which of the following is the fastest reaction?
- A$C + \frac{1}{2} O_2 \xrightarrow{250 \ ^oC} CO$
- B$C + \frac{1}{2} O_2 \xrightarrow{500 \ ^oC} CO$
- C$C + \frac{1}{2} O_2 \xrightarrow{750 \ ^oC} CO$
- D$C + \frac{1}{2} O_2 \xrightarrow{1000 \ ^oC} CO$
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