Which of the following would be most likely to be considered a "substantial step" under the Model Penal Code's approach to attempt? A. Marcus draws up plans for robbing a bank, including mapping out the getaway route. B. Marion is found outside a bank on a hot August night with lock-picking tools, a flashlight, a ski mask, leather gloves, and a large empty bag. C. Henry fantasizes about stealing a large medallion from his ex-girlfriend. D. Sallah purchases a gun to use in a robbery