Answer: D - During this school-wide unit on substance abuse, students participated in an activity known as a simulation, which is a type of partial immersion. Full immersion would have involved placing students in the actual scenario of driving while intoxicated, which is obviously highly dangerous and illegal. Simulations allow students to work with mock situations and problems in a controlled setting so that they can gain experiential knowledge when it is not possible or appropriate to expose them to actual situations and problems.