Which one of the following statements in incorrect with regard to experiments and counting rules and assigning probabilities?

• A. An experiment with three steps and four outcomes possible for each step has 64 experimental outcomes.
• B. In an experiment with 4 equally likely outcomes, each experimental outcome has a probability of 0.25.
• C. The number of combinations of five items that can be selected from a group of seven items is 21.
• D. A classical method of assigning probabilities is appropriate when all experimental outcomes are equally likely.
• E. The number of permutations of three items that can be selected from a group of eight item is 56.