In Making an Active Prediction That Using a Large Banner

Multiple Choice

In making an active prediction that using a large banner advertisement will increase click-through rates based on a sample of data, what is not an appropriate criticism that someone might have for your prediction?

A) That your sample was not randomly selected.
B) That you do not have a large enough sample.
C) That the underlying population distribution is not normal.
D) That you used a sample of data to make a prediction about the population.