The Closing Price of a Company's Stock Tomorrow Can Be

The closing price of a company's stock tomorrow can be lower, higher or the same as today's closing price. Based on the closing price of the stock collected over the last month, on 25% of the days the closing price was higher than previous day's closing price, on 45% of the days it was lower than previous day's closing price, and on 30% of the days it was the same as previous day's closing price. Based on this information, the probability that tomorrow's closing price will be higher than today's is 25%. This is an example of using which of the following probability approach?

A) a priori probability
B) empirical probability
C) subjective probability
D) conditional probability