Maybe I didn't make the concept clear enough, sorry about that. The idea is to get the lowest possible score by answering wrong on each question. Each question has 3 right answers, and 1 wrong answer. So on the cinnamon roll question, sugar, butter and milk are all correct, and the wrong answer is baking soda, so you want to pick baking soda to get -1 point. So yeah you're right, yeast is the correct way to rise the dough ;)