B, there is enough oxygen in the air to make the candle burn, so it is wrong;
C, the gas inside the carton is also air, and the content of carbon dioxide is the same as that outside the carton, so it is wrong;
D, the airflow from the small hole in the paper box makes the temperature of the candle drop to the ignition point, and the candle goes out, so it is correct.
So choose d