Once Again Using the Example About Supermarket Fliers, We Would

Once again using the example about supermarket fliers, we would have evidence that the "don't litter" message on the flier was effective if we found that

A) the probability of finding a flier with the message in the trash can was substantially higher than the probability calculated on the assumption that the two events were independent.
B) the probability of finding a flier with the message in the trash can was substantially lower than the probability calculated on the assumption that the two events were independent.
C) the probability of finding a flier with the message in the trash can was the same as the probability calculated on the assumption that the two events were independent.
D) We can't tell from the information available.