Which of the following is a factor of fuel oil almost having nothing to do with the formation of combustion products?（）

A.1-2-3-4-5-6
B.1-2-3-6-5-4
C.1-5-3-6-2-4
D.1-3-4-5-6-2

A.the peak pressure in a cylinder
B.the temperature of the cooling water
C.the fuel consumption
D.none of the above

A.power
B.maximum pressure in a cylinder
C.mean pressure in a cylinder
D.all of the above