The white phosphorus in A, ① and ② can't burn, which can't prove that the combustible must burn at a certain temperature, so A is wrong.
B, ② White phosphorus combustion lacks oxygen, ③ White phosphorus combustion lacks temperature, which cannot prove that combustible combustion must reach a certain temperature, so B is wrong;
The difference between C, ② and ④ is that combustion needs oxygen, which cannot prove that combustible combustion must reach a certain temperature, so C is wrong;
The difference between D, ③ and ④ means that the combustion needs to reach the ignition point, that is, the combustible combustion must reach a certain temperature, so D is correct.
So choose d