You spend $5000 on one year of culinary school tuition immediately after high school. The tuition is not refundable. After 3 months you want to go to college rather than continue culinary school. An economist would tell you that the cost of your cooking school tuition should be: A. left out of your decision whether or not to go to college, B considered a marginal benefit of changing your mind, C. considered one of the main cost of changing your mind, D. considered an implicit cost of changing your mind.