A Study Found That the Relative Risk (RR) for the Association

A study found that the relative risk (RR) for the association between air pollution and asthma was RR=1.5, 95%CI (1.2-1.9) with a P value of 0.001.The likelihood that this
Association occurred by chance is:

A) 1 in 20
B) 1 in 100
C) 1 in 1000
D) None of the above