Volatility of diesel fuel oil is_________________?

A. it catches fire without external aid

B. temperature at which it solidifies or congeals

C. indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off

D. minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

E. temperature at which it flows easily

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