Let us evaluate the probabilities one by one.
Firstly, we look at the probability of Event A.
Event A has a probability p_A equal to 0.6.
Then, let's evaluate the probability of Event B.
Event B has a probability p_B equal to 0.15.
Next, we want to identify which of these two events have a probability of 0.15.
Upon comparing p_A and p_B with 0.15, we observe that the probability of Event A is 0.6, which does not equal to 0.15. Therefore, we can exclude this event.
Then, we look at the probability of event B, which is 0.15. This is exactly the value we are looking for, therefore we can conclude that the event with the probability of 0.15 is Event B.
Thus, the correct answer is B) Event B.
Answer: B) Event B