A probability always lies bewteen 0 and 1. So, option B is not even a probability.
As for the others, probability 0 means that the even't cannot happen, whereas probability 1 means that event is certain. So, the bigger the number, the greater the probability (as one may expect).
Since 0.09 < 0.12 < 0.89, the greatest number represents the event that is more likely to occur.
