For the condition 1, we can know that the probability of not calling the police is (1-0.9). =0.00 1, so the alarm probability is 1-0.00 1=0.999, so the condition 1 is sufficient.

For condition 2, we can know that the probability of not calling the police is (1-0.97). =0.0006, so the alarm probability is 1-0.0006 = 0.9994 > 0.999, so condition 2 is sufficient.

Therefore, the comprehensive conditions 1 and 2 choose D.