Which of the Following Probabilities Would Be Best Determined by Using

Which of the following probabilities would be best determined by using the method of equal alternatives?

A) the odds that a certain battery will last for another hour
B) the odds that a bacterial infection will respond to the first round of antibiotics
C) the odds that a cat's next litter will have four kittens
D) the odds that the sound in your attic is a raccoon
E) the odds that, at a certain time, a certain cow will be facing east, rather than any of the other three directions