I was also just working on this game and hope you can lend some assistance. Obviously, the game hinges on conditional rules and one slip up notating can get you in big trouble. I am positive I notated the rules correctly, but for some reason, I CAN NOT see why the answer to #15 is D. I must have done and redone this question a dozen times and I am still not getting it. Like JD, I have been prepping hard and fatigue might be getting the best of me as I am sure the answer is quite obvious. Any help would be greatly appreciated!