Three companies Zammilk, Bonita, and Contact supply 25%, 33%, 40% milk to a supermarket respectively. Past experience shows that 5%, 4%, and 2% of the milk supplied by the respective companies is stale. If the milk was found to be stale, what is the probability that it was supplied by Zammilk?
A) 0.0345
B) 0.0125
C) 0.238
D) 0.362