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Many individuals require organ transplants every year. Unfor…

Many individuals require organ transplants every year. Unfortunately, there are not enough donors to meet the needs in most countries. In Europe, several countries have discovered a successful way to increase the number of donors—make everyone an organ donor unless s/he opts out. In one of the Choiceology podcasts that you listened to as part of Lesson 14, it describes other similar applications (e.g., retirement) to the organ donor program. Which of the following cognitive principles does the organ donor program and similar applications rely on to be effective?